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arch
An arch is a curved shape that is high in the center with the ends pointing down. (noun)
An upside down U is an example of an arch.
The prefix arch- means to be primary or first. (prefix)
An example of usage of the prefix arch- is in the word archenemy, meaning your greatest enemy.
To arch something is to create a curved shape that is higher in the middle, sometimes by moving your body into a position that resembles that shape. (verb)
An example of arch is to raise your eyebrows.
The prefix arch- means to be the epitome or consummate of a type. (prefix)
An example of usage of the prefix arch is in the word archconservative, meaning most representative of a conservative.
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See arch in Webster's New World College Dictionary
See arch in American Heritage Dictionary 4
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