acquiescence       
noun [ U ]  formal uk/ˌæk.wiˈes.əns/ us/ˌæk.wiˈes.əns/
 默许
the act of accepting or agreeing to something, often unwillingly
  I was surprised by her acquiescence to/in the plan. 我对她默许该计划感到惊讶。 
 She nodded her acquiescence. 她点头默许。 
 Synonyms: agreement (SAME OPINION)approval (PERMISSION)assent say-so (PERMISSION) 
 See: acquiescent
 - More examples
- The best the leader can hope for is grudging acquiescence from the majority of his party.
- His acquiescence in the nuclear deal may have been a tactical concession.
- To have accepted such an arrangement would have been would have meant tacit acquiescence in violence.