Acquiescence
Part of speech: noun
Definition: A silent or passive assent or submission, or a submission with apparent content; - distinguished from avowed consent on the one hand, and on the other, from opposition or open discontent; quiet satisfaction. Submission to an injury by the party injured, or tacit concurrence in the action of another.
Assent
Part of speech: verb
Definition: To agree to, give approval to.
Part of speech: noun
Definition: agreement, act of agreeing