efforce /ɪˈfɔː(ɹ)s/ verb2 •(no longer used) To force, force open; to acquire by force.huge great yron chests and coffers strong, / All bard with double bends, that none could weene / Them to efforce by violence or wrong […] — 1590 •[with oneself] (no longer used) To force oneself. formsefforced · efforcing · efforces