1)
2) free,set free,exempt,rid,rid oneself,work off,sweep away,cast aside,cast off,cast out,shake off,supervise out of,excuse
3) liberate,deliver,affranchise,set at liberty
4) vacate
5) discharge,dismiss,release,relieve,fire,disburden,give the sack,discard,axe,kick off,ease out,sign off
6) release,unchain,acquit,set at large,extricate from,disentangle from