accede

verb5

1. •
   To agree or assent [with to ‘a proposal, a request’]; to give way.
2. •
   To come to an office, state or dignity; to attain, assume (a position) [with to].

   • the house of Hanover acceded to the English throne
3. •
   To become a party to an agreement or a treaty [with to].
4. •
   (no longer used) To give one's adhesion; to join up with (a group, etc.); to become part of.
5. •
   (no longer used) To approach; to arrive, to come forward.