decolonize

verb (used with object), de·col·o·nized, de·col·o·niz·ing.

1. to release from the status of a colony.
2. to allow (a colony) to become self-governing or independent.

verb (used without object), de·col·o·nized, de·col·o·niz·ing.

3. to free a colony to become self-governing or independent.

verb

1. (tr) to grant independence to (a colony)