名詞 antagonism:

1. a state of deep-seated ill-will
   同義詞：hostility, enmity
2. the relation between opposing principles or forces or factors
3. an actively expressed feeling of dislike and hostility
4. (biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure

1. The antagonism he felt towards his old enemy was still very strong.
   他對舊冤家的敵對情緒仍然很大。
2. You could sense the antagonism between them.
   你能覺察出他們之間有對立情緒。

an.tag.o.nism

n.（名詞）
Hostility that results in active resistance, opposition, or contentiousness.See Synonyms at enmity
對抗，對立，敵對，敵意：由于強(qiáng)烈抵制、反對或爭吵而產(chǎn)生的敵意參見 enmity
The condition of being an opposing principle, force, or factor:
敵對狀態(tài)，對抗性：成為對立原則、力量或因素的狀態(tài)：
例句：
the inherent antagonism of capitalism and socialism.
資本主義和社會(huì)主義的根本對立狀態(tài)

Biochemistry Interference in the physiological action of a chemical substance by another having a similar structure.
【生物化學(xué)】 對抗作用：一種化學(xué)物質(zhì)被另一種具有類似結(jié)構(gòu)的化學(xué)物質(zhì)進(jìn)行的生理行為干涉