"antagonist" | Definition and Related Words

Noun

Someone who offers opposition (synset 109792668)
is a type of: individual, mortal, person, somebody, someone, soul - a human being
subtypes:
- dueler, duelist, dueller, duellist - a person who fights duels
- enemy, foe, foeman, opposition - an armed adversary (especially a member of an opposing military force)
- luddite - any opponent of technological progress
- withstander - an opponent who resists with force or resolution
specific instances: antichrist - (Christianity) the adversary of Christ (or Christianity) mentioned in the New Testament; the Antichrist will rule the world until overthrown by the Second Coming of Christ

same as: adversary, opponent, opposer, resister
A muscle that relaxes while another contracts (synset 105300919)
"when bending the elbow the triceps are the antagonist"

is a type of: antagonistic muscle - (physiology) a muscle that opposes the action of another
A drug that neutralizes or counteracts the effects of another drug (synset 102717794)
is a type of: drug - a substance that is used as a medicine or narcotic
subtypes:
- estrogen antagonist, tamoxifen - an antagonist for estrogen that is used in the treatment of breast cancer
- narcotic antagonist - an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration)