consent

con·sent   (kən-sěnt')    intr.v.   con·sent·ed, con·sent·ing, con·sents To give assent, as to the proposal of another; agree. See Synonyms at assent. Archaic To be of the same mind or opinion. n.   Acceptance or approval of what is planned or done by another; acquiescence. See Synonyms at permission. Agreement as to opinion or a course of action: She was chosen by common consent to speak for the group. [Middle English consenten, from Old French consentir, from Latin cōnsentīre : com-, com- + sentīre, to feel; see sent- in Indo-European roots.] con·sent'er n.

consent 

Main Entry: con·sent
Function: noun
1 a : compliance in or approval of what is done or proposed by another; specifically : the voluntary agreement or acquiescence by a person of age or with requisite mental capacity who is not under duress or coercion and usually who has knowledge or understanding —see also AGE OF CONSENT, INFORMED CONSENT, RAPE, STATUTORY RAPE b : a defense claiming that the victim consented to an alleged crime (as rape)
2 : agreement as to action or opinion consent of the Senate, to make treaties —U.S. Constitution article II> consent of the parties established through offer and acceptance —Louisiana Civil Code>; specifically : voluntary agreement by a people to organize a civil society and give authority to a government —consent intransitive verb —con·sent·er noun