(v. t.) To loose the clasp of; to open, as something that is fastened, or as with, a clasp; as, to unclasp a book; to unclasp one's heart.

cast off detach disengage doff free leave go let go let loose of liberate loose loosen release remove take off unbar unbind unbolt unbuckle unbutton unchain unclutch undo unfasten unfetter unglue unhand unlace unlatch unleash unlock unloose unloosen unstick unstrap untie weigh anchor