Constituting or forming part of the essence of something

• vital

  1. Of, relating to, or characteristic of life:
  2. Necessary to the continuation of life; life-sustaining:
  3. Used or done on a living cell or tissue:

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  1. Of, relating to, or characteristic of life:
  2. Necessary to the continuation of life; life-sustaining:
  3. Used or done on a living cell or tissue:

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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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• essential

  1. Constituting or being part of the nature or essence of something; inherent:
  2. Fundamentally important or necessary:
  3. Of, relating to, or being a condition or a disease whose cause is unknown:

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  1. Constituting or being part of the nature or essence of something; inherent:
  2. Fundamentally important or necessary:
  3. Of, relating to, or being a condition or a disease whose cause is unknown:

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• constitutive

  1. Making a thing what it is; essential.
  2. Having power to institute, establish, or enact.
  3. Of or relating to the synthesis of a protein or an enzyme at a constant rate regardless of physiological demand or the concentration of a substrate.

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  1. Making a thing what it is; essential.
  2. Having power to institute, establish, or enact.
  3. Of or relating to the synthesis of a protein or an enzyme at a constant rate regardless of physiological demand or the concentration of a substrate.

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• constitutional

  1. Of or relating to a constitution:
  2. Consistent with, sanctioned by, or permissible according to a constitution:
  3. Established by or operating under a constitution:

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  1. Of or relating to a constitution:
  2. Consistent with, sanctioned by, or permissible according to a constitution:
  3. Established by or operating under a constitution:

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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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Lacking nothing essential or normal

• whole

  1. Containing all components; complete:
  2. Not divided or disjoined; in one unit:
  3. Constituting the full amount, extent, or duration:

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  1. Containing all components; complete:
  2. Not divided or disjoined; in one unit:
  3. Constituting the full amount, extent, or duration:

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• perfect

  1. Lacking nothing essential to the whole; complete of its nature or kind.
  2. Being without defect or blemish:
  3. Thoroughly skilled or talented in a certain field or area; proficient.

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  1. Lacking nothing essential to the whole; complete of its nature or kind.
  2. Being without defect or blemish:
  3. Thoroughly skilled or talented in a certain field or area; proficient.

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• intact

  1. Remaining sound, entire, or uninjured; not impaired in any way.
  2. Having the hymen unbroken.
  3. Not castrated.

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  1. Remaining sound, entire, or uninjured; not impaired in any way.
  2. Having the hymen unbroken.
  3. Not castrated.

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• full

  1. Containing all that is normal or possible:
  2. Complete in every particular:
  3. Amounting to three balls and two strikes. Used of a count.

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  1. Containing all that is normal or possible:
  2. Complete in every particular:
  3. Amounting to three balls and two strikes. Used of a count.

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• entire

  1. Having no part excluded or left out; whole:
  2. Constituting the full amount, extent, or duration:
  3. Not broken, decayed, or divided; intact:

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  1. Having no part excluded or left out; whole:
  2. Constituting the full amount, extent, or duration:
  3. Not broken, decayed, or divided; intact:

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• complete

  1. Having all necessary or normal parts, components, or steps; entire:
  2. Having all principal parts, namely, the sepals, petals, stamens, and pistil or pistils. Used of a flower.
  3. Having come to an end; concluded:

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  1. Having all necessary or normal parts, components, or steps; entire:
  2. Having all principal parts, namely, the sepals, petals, stamens, and pistil or pistils. Used of a flower.
  3. Having come to an end; concluded:

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An organized array of individual elements and parts forming and working as a unit

• whole

  1. Containing all components; complete:
  2. Not divided or disjoined; in one unit:
  3. Constituting the full amount, extent, or duration:

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  1. Containing all components; complete:
  2. Not divided or disjoined; in one unit:
  3. Constituting the full amount, extent, or duration:

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• totality

  1. The quality or state of being total:
  2. An aggregate amount; a sum.
  3. The phase of an eclipse when it is total.

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  1. The quality or state of being total:
  2. An aggregate amount; a sum.
  3. The phase of an eclipse when it is total.

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• system

  1. An organism as a whole, especially with regard to its vital processes or functions:
  2. A group of physiologically or anatomically related organs or parts:
  3. A group of interacting mechanical or electrical components:

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  1. An organism as a whole, especially with regard to its vital processes or functions:
  2. A group of physiologically or anatomically related organs or parts:
  3. A group of interacting mechanical or electrical components:

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• sum

  1. An amount obtained as a result of adding numbers.
  2. An arithmetic problem:
  3. The whole amount, quantity, or number; an aggregate:

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  1. An amount obtained as a result of adding numbers.
  2. An arithmetic problem:
  3. The whole amount, quantity, or number; an aggregate:

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• entity

  1. Something that exists as a particular and discrete unit:
  2. The fact of existence; being.
  3. The existence of something considered apart from its properties.

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  1. Something that exists as a particular and discrete unit:
  2. The fact of existence; being.
  3. The existence of something considered apart from its properties.

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Necessary for completeness

• 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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• 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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• necessary

  1. Needed or required:
  2. Unavoidably determined by prior conditions or circumstances; inevitable:
  3. Logically inevitable:

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  1. Needed or required:
  2. Unavoidably determined by prior conditions or circumstances; inevitable:
  3. Logically inevitable:

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• requisite

  1. Required; essential.
  2. Something that is indispensable; a requirement:

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  1. Required; essential.
  2. Something that is indispensable; a requirement:

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• component

  1. A constituent element, as of a system.
  2. A part of a mechanical or electrical complex.
  3. One of a set of two or more vectors having a sum equal to a given vector.

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  1. A constituent element, as of a system.
  2. A part of a mechanical or electrical complex.
  3. One of a set of two or more vectors having a sum equal to a given vector.

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• constituent

  1. Serving as part of a whole; component:
  2. Empowered to elect or designate.
  3. Authorized to make or amend a constitution:

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  1. Serving as part of a whole; component:
  2. Empowered to elect or designate.
  3. Authorized to make or amend a constitution:

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• indispensable

  1. Absolutely necessary; essential.
  2. Obligatory; unavoidable:
  3. One that is indispensable.

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  1. Absolutely necessary; essential.
  2. Obligatory; unavoidable:
  3. One that is indispensable.

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• essential

  1. Constituting or being part of the nature or essence of something; inherent:
  2. Fundamentally important or necessary:
  3. Of, relating to, or being a condition or a disease whose cause is unknown:

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  1. Constituting or being part of the nature or essence of something; inherent:
  2. Fundamentally important or necessary:
  3. Of, relating to, or being a condition or a disease whose cause is unknown:

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Made up of parts forming a whole

• unbroken

  1. Not tampered with; intact:
  2. Not violated or breached:
  3. Uninterrupted; continuous:

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  1. Not tampered with; intact:
  2. Not violated or breached:
  3. Uninterrupted; continuous:

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• undivided

  1. unified, whole

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  1. unified, whole

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• aggregate

  1. Constituting or amounting to a whole; total:
  2. Crowded or massed into a dense cluster.
  3. Composed of a mixture of minerals separable by mechanical means.

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  1. Constituting or amounting to a whole; total:
  2. Crowded or massed into a dense cluster.
  3. Composed of a mixture of minerals separable by mechanical means.

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• indivisible

  1. Incapable of undergoing division.
  2. Incapable of being divided without a remainder:

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  1. Incapable of undergoing division.
  2. Incapable of being divided without a remainder:

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• entire

  1. Having no part excluded or left out; whole:
  2. Constituting the full amount, extent, or duration:
  3. Not broken, decayed, or divided; intact:

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  1. Having no part excluded or left out; whole:
  2. Constituting the full amount, extent, or duration:
  3. Not broken, decayed, or divided; intact:

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• complete

  1. Having all necessary or normal parts, components, or steps; entire:
  2. Having all principal parts, namely, the sepals, petals, stamens, and pistil or pistils. Used of a flower.
  3. Having come to an end; concluded:

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  1. Having all necessary or normal parts, components, or steps; entire:
  2. Having all principal parts, namely, the sepals, petals, stamens, and pistil or pistils. Used of a flower.
  3. Having come to an end; concluded:

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