ANTI

AN'TI, noun [Gr. See Ante.] A preposition signifying against, opposite, contrary, or in place of; used in many English words.

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An″ti (�). [[Gr. � against. See Ante.]] A prefix meaning against, opposite or opposed to, contrary, or in place of; — used in composition in many English words. It is often shortened to ant-; as, antacid, antarctic.