Origin: 1300–50; Middle English adversarie <
Latin adversārius, equivalent to
advers(
us) (
see adverse) +
-ārius -ary; replacing
Middle English adversere <
Anglo-French Related formsad·ver·sar·i·ness, noun
non·ad·ver·sar·i·al, adjective
Synonyms
1. Adversary, antagonist mean a person or a group contending against another. Adversary suggests an enemy who fights determinedly, continuously, and relentlessly: a formidable adversary. Antagonist suggests one who, in hostile spirit, opposes another, often in a particular contest or struggle: a duel with an antagonist.
Antonyms
1. ally.