acquiesce
ac·qui·esce
/ˌækwiˈɛs/ verb , -esc·es, -esced, -esc·ing [ no obj ]
formal : to accept, agree, or allow something to happen by staying silent or by not arguing
They demanded it, and he acquiesced.
— often + in
We cannot acquiesce in the killing of innocent people.
— often + to
She acquiesced to her husband's plans.
ac·qui·es·cence /ˌækwiˈɛsn̩s/ noun [ noncount ]
I was surprised by his acquiescence to their demands.