noun

The expression of approval or agreement.

a loud murmur of assent

approval,acceptance,assent,endorsement,encouragement,recognition,appreciation,support,respect,admiration,commendation,congratulations

intransitive verb

Express approval or agreement, typically officially.

“Guest house, then,” Frank assented cheerfully

agree to,accept,approve,consent to,acquiesce in,concur in,accede to,give one’s blessing to,bless,give one’s seal of approval to,give one’s stamp of approval to,rubber-stamp,say yes to