con·sent 
(kən-sĕnt)
(kən-sĕnt)intr.v. con·sent·ed, con·sent·ing, con·sents
1. To give assent, as to the proposal of another; agree: consent to medical treatment; consent to going on a business trip; consent to see someone on short notice. See Synonyms at assent.
2. Archaic To be of the same mind or opinion.
n.
1. Acceptance or approval of what is planned or done by another; acquiescence. See Synonyms at permission.
2. 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 the Appendix of Indo-European roots.]
con·senter n.