antagonist

• 指积极反对或敌视某人某物的人；在解剖学中指与另一肌肉作用相反的肌肉，在药理学中指中和另一药物作用的物质。

A noun referring to a person who actively opposes or is hostile to someone or something; also used in anatomy for a muscle that opposes the action of another, and in pharmacology for a substance that counteracts the effects of another drug.

1. Opponent or adversaryB2formal

   A person who actively opposes or is hostile to someone or something; an adversary.

   对手或敌人

   • The hero finally defeated his antagonist in the final battle.
   • She was a formidable antagonist in the political debate.
   • The novel's antagonist is a cunning and manipulative character.

   同义词adversarychallengercompetitorcontenderenemyfoehostileopponentopposerrival

   反义词advocateallyfriendproponentsupporter

2. Opposing muscleC1formalmedical

   A muscle that acts in opposition to the action of another muscle, relaxing while the other contracts.

   拮抗肌

   • The biceps and triceps are antagonist muscle pairs.
   • When you flex your arm, the antagonist muscle relaxes.
   • Physical therapy often focuses on strengthening antagonist muscles.

   同义词antagonistic muscle

   反义词agonistprotagonistsynergist

3. Drug blockerC1formalmedical

   A substance that inhibits or counteracts the physiological action of another substance, such as a hormone or neurotransmitter.

   拮抗剂

   • The doctor prescribed an opioid antagonist to reverse the overdose.
   • This drug acts as a receptor antagonist, blocking the effects of histamine.
   • Antagonist drugs are used to treat various conditions by neutralizing harmful substances.

   同义词blockerblocking agentinhibitor

   反义词agonist