antagonism
/ænˈtægənɪzəm; æn`tæɡəˌnɪzəm/ n[C, U]
~ (against/for/to/towards sb/sth); ~ (between A and B) (instance of) active opposition or hostility, esp between two people 对立, 对抗, 敌对（尤指两人之间）
The antagonism he felt towards his old enemy was still very strong. 他对旧冤家的敌对情绪仍然很大.
You could sense the antagonism between them. 你能觉察出他们之间有对立情绪.