Something that impedes or prevents entry or passage

• wall

  1. An upright structure of masonry, wood, plaster, or other building material serving to enclose, divide, or protect an area, especially a vertical construction forming an inner partition or exterior siding of a building.
  2. A continuous structure of masonry or other material forming a rampart and built for defensive purposes.
  3. A structure of stonework, cement, or other material built to retain a flow of water.

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  1. An upright structure of masonry, wood, plaster, or other building material serving to enclose, divide, or protect an area, especially a vertical construction forming an inner partition or exterior siding of a building.
  2. A continuous structure of masonry or other material forming a rampart and built for defensive purposes.
  3. A structure of stonework, cement, or other material built to retain a flow of water.

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• traverse

  1. To travel or pass across, over, or through:
  2. To move to and fro over; cross and recross:
  3. To go up, down, or across (a slope) diagonally, as in skiing.

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  1. To travel or pass across, over, or through:
  2. To move to and fro over; cross and recross:
  3. To go up, down, or across (a slope) diagonally, as in skiing.

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• stop

  1. To close (an opening or hole) by covering, filling in, or plugging up:
  2. To constrict (an opening or orifice):
  3. To obstruct or block passage on (a road, for example).

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  1. To close (an opening or hole) by covering, filling in, or plugging up:
  2. To constrict (an opening or orifice):
  3. To obstruct or block passage on (a road, for example).

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• obstruction

  1. Something that obstructs; an obstacle:
  2. The act of obstructing:
  3. The condition of being obstructed:

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  1. Something that obstructs; an obstacle:
  2. The act of obstructing:
  3. The condition of being obstructed:

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• obstacle

  1. Something that stands in the way of or holds up progress:

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  1. Something that stands in the way of or holds up progress:

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• impediment

  1. Something that impedes; a hindrance or obstruction.
  2. Something that obstructs the making of a legal contract.
  3. A physical defect, especially one that interferes with speech.

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  1. Something that impedes; a hindrance or obstruction.
  2. Something that obstructs the making of a legal contract.
  3. A physical defect, especially one that interferes with speech.

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• hurdle

  1. A light portable barrier over which competitors must leap in certain races.
  2. A race in which a series of such barriers must be jumped without the competitors' breaking their stride.
  3. A leaping step made off one foot as means of maximizing spring at the end of an approach, as to a dive.

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  1. A light portable barrier over which competitors must leap in certain races.
  2. A race in which a series of such barriers must be jumped without the competitors' breaking their stride.
  3. A leaping step made off one foot as means of maximizing spring at the end of an approach, as to a dive.

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• hindrance

  1. The act of hindering:
  2. The condition of being hindered.
  3. Something that hinders; an impediment.

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  1. The act of hindering:
  2. The condition of being hindered.
  3. Something that hinders; an impediment.

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• hamper

  1. To prevent the free movement, action, or progress of:
  2. Necessary but encumbering equipment on a ship.

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  1. To prevent the free movement, action, or progress of:
  2. Necessary but encumbering equipment on a ship.

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• clog

  1. An obstruction or hindrance.
  2. A weight, such as a block, attached to the leg of an animal to hinder movement.
  3. A heavy, traditionally wooden-soled shoe.

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  1. An obstruction or hindrance.
  2. A weight, such as a block, attached to the leg of an animal to hinder movement.
  3. A heavy, traditionally wooden-soled shoe.

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• blockage

  1. The act of obstructing.
  2. An obstruction.

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  1. The act of obstructing.
  2. An obstruction.

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• block

  1. A solid piece of a hard substance, such as wood, having one or more flat sides.
  2. Such a piece used as a construction member or as a support.
  3. Such a piece upon which chopping or cutting is done:

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  1. A solid piece of a hard substance, such as wood, having one or more flat sides.
  2. Such a piece used as a construction member or as a support.
  3. Such a piece upon which chopping or cutting is done:

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• barrier

  1. A material formation or structure, such as a mountain range or wall, that prevents passage or access.
  2. Something immaterial that obstructs or impedes:
  3. A membrane, tissue, or mechanism that blocks the passage of certain substances.

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  1. A material formation or structure, such as a mountain range or wall, that prevents passage or access.
  2. Something immaterial that obstructs or impedes:
  3. A membrane, tissue, or mechanism that blocks the passage of certain substances.

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• barricade

  1. A usually improvised structure set up, as across a route of access, to obstruct the passage of an enemy or opponent.
  2. A usually temporary structure set up to restrict or control the movement of people or conveyances:
  3. Something that serves as an obstacle; a barrier:

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  1. A usually improvised structure set up, as across a route of access, to obstruct the passage of an enemy or opponent.
  2. A usually temporary structure set up to restrict or control the movement of people or conveyances:
  3. Something that serves as an obstacle; a barrier:

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• bar

  1. A relatively long, straight, rigid piece of solid material used as a fastener, support, barrier, or structural or mechanical member.
  2. A solid oblong block of a substance or combination of ingredients, such as soap or candy.
  3. Any of various flat baked confections that are typically dense and harder than cakes and served cut into rectangular pieces.

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  1. A relatively long, straight, rigid piece of solid material used as a fastener, support, barrier, or structural or mechanical member.
  2. A solid oblong block of a substance or combination of ingredients, such as soap or candy.
  3. Any of various flat baked confections that are typically dense and harder than cakes and served cut into rectangular pieces.

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A tricky or unsuspected condition

• catch

  1. To get and hold (something that has been in motion) in a hand, the hands, a container, or an implement:
  2. To take hold of, especially forcibly or suddenly; grasp:
  3. To stop (oneself) from doing an action:

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  1. To get and hold (something that has been in motion) in a hand, the hands, a container, or an implement:
  2. To take hold of, especially forcibly or suddenly; grasp:
  3. To stop (oneself) from doing an action:

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• rub

  1. To apply pressure and friction to (a surface).
  2. To clean, polish, or manipulate by the application of pressure and friction.
  3. To apply to a surface firmly and with friction:

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  1. To apply pressure and friction to (a surface).
  2. To clean, polish, or manipulate by the application of pressure and friction.
  3. To apply to a surface firmly and with friction:

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