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Language: Old French
Origin: Latin, from Greek, from anti 'opposite, against'

anti-

prefix
     
anti-
1 opposed to [≠ pro-]:
antinuclear (=opposing the use of nuclear weapons and power)
anti-American
2XX the opposite of something:
anticlimax (=an unexciting ending instead of the expected exciting ending)
antimatter (=material completely opposite in kind to the ordinary material in the universe)
3XX acting to prevent something:
antifreeze (=a liquid added to a car's engine to prevent freezing)
antiseptic (=a liquid that kills harmful bacteria)

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