Most important, influential, or significant

• top

  1. The uppermost part, point, surface, or end:
  2. The part farthest from a given reference point:
  3. The crown of the head:

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  1. The uppermost part, point, surface, or end:
  2. The part farthest from a given reference point:
  3. The crown of the head:

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• principal

  1. First or highest in rank or importance.
  2. Of, relating to, or being financial principal, or a principal in a financial transaction.
  3. One who holds a position of presiding rank, especially the head of an elementary school, middle school, or high school.

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  1. First or highest in rank or importance.
  2. Of, relating to, or being financial principal, or a principal in a financial transaction.
  3. One who holds a position of presiding rank, especially the head of an elementary school, middle school, or high school.

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• prime

  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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• premier

  1. First in status or importance; principal or chief:
  2. First to occur or exist; earliest.
  3. A prime minister.

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  1. First in status or importance; principal or chief:
  2. First to occur or exist; earliest.
  3. A prime minister.

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• paramount

  1. Of chief concern or importance:
  2. Highest in rank, power, or authority:
  3. One that has the highest rank, power, or authority.

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  1. Of chief concern or importance:
  2. Highest in rank, power, or authority:
  3. One that has the highest rank, power, or authority.

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• number one

  1. One that is first in rank, order, or importance.
  2. One's own interests; oneself:
  3. The act of urinating.

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  1. One that is first in rank, order, or importance.
  2. One's own interests; oneself:
  3. The act of urinating.

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• major

  1. Greater than others in importance or rank:
  2. Great in scope or effect:
  3. Great in number, size, or extent:

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  1. Greater than others in importance or rank:
  2. Great in scope or effect:
  3. Great in number, size, or extent:

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• main

  1. Most important; principal.
  2. Exerted to the utmost; sheer:
  3. Connected to or located near the mainmast:

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  1. Most important; principal.
  2. Exerted to the utmost; sheer:
  3. Connected to or located near the mainmast:

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• leading

  1. Having a position in the lead; foremost:
  2. Chief; principal:
  3. Of or performing a lead in a theatrical production:

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  1. Having a position in the lead; foremost:
  2. Chief; principal:
  3. Of or performing a lead in a theatrical production:

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• key

  1. A notched and grooved, usually metal implement that is turned to open or close a lock.
  2. A similar implement or an electronic device used for opening, winding, or starting something:
  3. A device, such as a wedge or pin, inserted to lock together mechanical or structural parts.

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  1. A notched and grooved, usually metal implement that is turned to open or close a lock.
  2. A similar implement or an electronic device used for opening, winding, or starting something:
  3. A device, such as a wedge or pin, inserted to lock together mechanical or structural parts.

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• foremost

  1. More prominent or important than others, especially in position or rank:
  2. First in physical position or place:
  3. Above all else; most importantly:

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  1. More prominent or important than others, especially in position or rank:
  2. First in physical position or place:
  3. Above all else; most importantly:

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• first

  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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• chief

  1. One who is highest in rank or authority; a leader.
  2. A chief petty officer.
  3. The chief engineer of a ship.

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  1. One who is highest in rank or authority; a leader.
  2. A chief petty officer.
  3. The chief engineer of a ship.

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• cardinal

  1. Of foremost importance; paramount:
  2. Dark to deep or vivid red.
  3. A high church official, ranking just below the pope, who has been appointed by a pope to membership in the College of Cardinals.

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  1. Of foremost importance; paramount:
  2. Dark to deep or vivid red.
  3. A high church official, ranking just below the pope, who has been appointed by a pope to membership in the College of Cardinals.

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• capital

  1. A town or city that is the official seat of government in a political entity, such as a state or nation.
  2. A city that is the center of a specific activity or industry:
  3. Wealth, especially in the form of financial or physical assets, used in the production or accumulation of more wealth.

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  1. A town or city that is the official seat of government in a political entity, such as a state or nation.
  2. A city that is the center of a specific activity or industry:
  3. Wealth, especially in the form of financial or physical assets, used in the production or accumulation of more wealth.

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Preceding all others in time

• primordial

  1. Being or happening first in sequence of time; original.
  2. Primary or fundamental:
  3. Belonging to or characteristic of the earliest stage of development of an organism or a part:

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  1. Being or happening first in sequence of time; original.
  2. Primary or fundamental:
  3. Belonging to or characteristic of the earliest stage of development of an organism or a part:

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• prime

  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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• pioneer

  1. One who ventures into unknown or unclaimed territory to settle.
  2. One who opens up new areas of thought, research, or development:
  3. A soldier who performs construction and demolition work in the field to facilitate troop movements.

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  1. One who ventures into unknown or unclaimed territory to settle.
  2. One who opens up new areas of thought, research, or development:
  3. A soldier who performs construction and demolition work in the field to facilitate troop movements.

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• original

  1. Preceding all others in time; first:
  2. Not derived from something else; fresh and unusual:
  3. Showing a marked departure from previous practice; new:

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  1. Preceding all others in time; first:
  2. Not derived from something else; fresh and unusual:
  3. Showing a marked departure from previous practice; new:

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• maiden

  1. An unmarried girl or woman.
  2. A woman or girl who is a virgin.
  3. A machine resembling the guillotine, used in Scotland in the 1500s and 1600s to behead criminals.

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  1. An unmarried girl or woman.
  2. A woman or girl who is a virgin.
  3. A machine resembling the guillotine, used in Scotland in the 1500s and 1600s to behead criminals.

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• initial

  1. Of, relating to, or occurring at the beginning; first:
  2. Designating the first letter or letters of a word.
  3. The first letter of a proper name.

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  1. Of, relating to, or occurring at the beginning; first:
  2. Designating the first letter or letters of a word.
  3. The first letter of a proper name.

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• first

  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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• earliest

  1. superlative form of early: most early

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  1. superlative form of early: most early

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Not derived from something else

• primitive

  1. Of or relating to an early or original stage or state; primeval:
  2. Occurring in or characteristic of an early stage of development or evolution:
  3. Having developed early in the evolutionary history of a group:

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  1. Of or relating to an early or original stage or state; primeval:
  2. Occurring in or characteristic of an early stage of development or evolution:
  3. Having developed early in the evolutionary history of a group:

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• prime

  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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• original

  1. Preceding all others in time; first:
  2. Not derived from something else; fresh and unusual:
  3. Showing a marked departure from previous practice; new:

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  1. Preceding all others in time; first:
  2. Not derived from something else; fresh and unusual:
  3. Showing a marked departure from previous practice; new:

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Arising from or going to the root or source

• underlying

  1. Lying under or beneath something:
  2. Basic; fundamental:
  3. Present but not readily noticeable:

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  1. Lying under or beneath something:
  2. Basic; fundamental:
  3. Present but not readily noticeable:

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• radical

  1. Arising from or going to a root or source; basic:
  2. Departing markedly from the usual or customary; extreme or drastic:
  3. Relating to or advocating fundamental or revolutionary changes in current practices, conditions, or institutions:

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  1. Arising from or going to a root or source; basic:
  2. Departing markedly from the usual or customary; extreme or drastic:
  3. Relating to or advocating fundamental or revolutionary changes in current practices, conditions, or institutions:

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• original

  1. Preceding all others in time; first:
  2. Not derived from something else; fresh and unusual:
  3. Showing a marked departure from previous practice; new:

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  1. Preceding all others in time; first:
  2. Not derived from something else; fresh and unusual:
  3. Showing a marked departure from previous practice; new:

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• fundamental

  1. Of or relating to the foundation or base; elementary:
  2. Forming or serving as an essential component of a system or structure; central:
  3. Of great significance or entailing major change:

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  1. Of or relating to the foundation or base; elementary:
  2. Forming or serving as an essential component of a system or structure; central:
  3. Of great significance or entailing major change:

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• foundational

  1. of, or relating to a foundation or foundations
  2. fundamental or underlying

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  1. of, or relating to a foundation or foundations
  2. fundamental or underlying

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• basic

  1. Of, relating to, or forming a base; fundamental:
  2. Of, being, or serving as a starting point or basis:
  3. Of or relating to a base.

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  1. Of, relating to, or forming a base; fundamental:
  2. Of, being, or serving as a starting point or basis:
  3. Of or relating to a base.

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• basal

  1. Of, relating to, located at, or forming a base.
  2. Located at or near the base of a plant stem, or at the base of any other plant part:
  3. Of primary importance; basic.

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  1. Of, relating to, located at, or forming a base.
  2. Located at or near the base of a plant stem, or at the base of any other plant part:
  3. Of primary importance; basic.

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Marked by the absence of any intervention

• immediate

  1. Occurring at once; happening without delay:
  2. Of or near the present time:
  3. Of or relating to the present time and place; current:

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  1. Occurring at once; happening without delay:
  2. Of or near the present time:
  3. Of or relating to the present time and place; current:

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• firsthand

  1. Received from the original source:

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  1. Received from the original source:

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• direct

  1. To manage or regulate the business or affairs of; be in charge of:
  2. To supervise or oversee (an activity or process):
  3. To give guidance and instruction to (actors or musicians, for example) in the rehearsal and performance of a work.

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  1. To manage or regulate the business or affairs of; be in charge of:
  2. To supervise or oversee (an activity or process):
  3. To give guidance and instruction to (actors or musicians, for example) in the rehearsal and performance of a work.

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Earliest

• first

  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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• initial

  1. Of, relating to, or occurring at the beginning; first:
  2. Designating the first letter or letters of a word.
  3. The first letter of a proper name.

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  1. Of, relating to, or occurring at the beginning; first:
  2. Designating the first letter or letters of a word.
  3. The first letter of a proper name.

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• primitive

  1. Of or relating to an early or original stage or state; primeval:
  2. Occurring in or characteristic of an early stage of development or evolution:
  3. Having developed early in the evolutionary history of a group:

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  1. Of or relating to an early or original stage or state; primeval:
  2. Occurring in or characteristic of an early stage of development or evolution:
  3. Having developed early in the evolutionary history of a group:

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Fundamental

• central

  1. Situated at, in, or near the center:
  2. Forming the center.
  3. Having dominant or controlling power or influence:

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  1. Situated at, in, or near the center:
  2. Forming the center.
  3. Having dominant or controlling power or influence:

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• basic

  1. Of, relating to, or forming a base; fundamental:
  2. Of, being, or serving as a starting point or basis:
  3. Of or relating to a base.

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  1. Of, relating to, or forming a base; fundamental:
  2. Of, being, or serving as a starting point or basis:
  3. Of or relating to a base.

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• elemental

  1. Of, relating to, or being an element.
  2. Fundamental or essential; basic.
  3. Of or relating to fundamentals; elementary.

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  1. Of, relating to, or being an element.
  2. Fundamental or essential; basic.
  3. Of or relating to fundamentals; elementary.

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Principal

• main

  1. Most important; principal.
  2. Exerted to the utmost; sheer:
  3. Connected to or located near the mainmast:

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  1. Most important; principal.
  2. Exerted to the utmost; sheer:
  3. Connected to or located near the mainmast:

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• prime

  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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• chief

  1. One who is highest in rank or authority; a leader.
  2. A chief petty officer.
  3. The chief engineer of a ship.

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  1. One who is highest in rank or authority; a leader.
  2. A chief petty officer.
  3. The chief engineer of a ship.

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