by main force
By sheer force or physical strength. I couldn't get my car out of the mud until my brothers came along and moved it by main force.
by main force
through sheer strength. Main derives from the Old English word mægen meaning ‘physical force’. As an adjective meaning ‘(of strength or force) exerted to the full’, it is a very ancient usage: mægenstrengo occurs in the Anglo-Saxon epic Beowulf.