unchain

verb (used with object)

1. to free from or as if from chains; set free.

verb (tr)

1. to remove a chain or chains from
2. to set at liberty; make free

v.1580s, from un- (2) “opposite of” + chain (v.). Figurative sense of “to liberate” is recorded from 1793. Related: Unchained; unchaining.