cede
verb [ T ] formal uk/siːd/ us/siːd/
（尤指不情愿地或被迫）割让，让予，放弃
to allow someone else to have or own something, especially unwillingly or because you are forced to do so
Hong Kong was ceded to Britain after the Opium War. 鸦片战争后香港被割让给了英国。