antagonist
noun
[ anˈtaɡ(ə)nɪst ]
• a person who actively opposes or is hostile to someone or something; an adversary.
• "he turned to confront his antagonist"
Similar:
adversary,
opponent,
enemy,
foe,
nemesis,
rival,
competitor,
contender,
opposition,
competition,
the other side,
corrival,
• a substance which interferes with or inhibits the physiological action of another.
• "LSD is a serotonin antagonist"
• a muscle whose action counteracts that of another specified muscle.
Origin:
late 16th century: from French antagoniste or late Latin antagonista, from Greek antagōnistēs, from antagōnizesthai ‘struggle against’ (see antagonize).
