to set (a person) free (especially politically)

set free

to set (a person, people) free

give freedom

(to cause something) to become loose or looser

unbind

to get back (something), get possession of (something) again

pay blackmail money for return of possession or person

to make, keep, a person, thing safe (from loss, death, injury etc); (dated) except: 'all save him'; to free (a person) from the need of using (something)

rescue

to undo the hooks of (a dress etc)

give freedom

to remove a screw or screws from (something)

set free; unbind