accede

verb (used without object), ac·ced·ed, ac·ced·ing.

1. to give consent, approval, or adherence; agree; assent; to accede to a request; to accede to the terms of a contract.
2. to attain or assume an office, title, or dignity; succeed (usually followed by to): to accede to the throne.
3. International Law. to become a party to an agreement, treaty, or the like, by way of accession.

verb (intr usually foll by to)

1. to assent or give one’s consent; agree
2. to enter upon or attain (to an office, right, etc)the prince acceded to the throne
3. international law to become a party (to an agreement between nations, etc), as by signing a treaty

v.

early 15c., from Latin accedere “approach, enter upon,” from ad- “to” (see ad-) + cedere “go, move” (see cede). Latin ad- usually became ac- before “k” sounds. Related: Acceded; acceding.