- ... as old boots - rough wild - Rugged - Having the quality of flexibility without brittleness;
yielding to force without breaking; capable of resisting great strain;
as, the ligaments of animals are remarkably tough. - Not easily broken; able to endure hardship; firm;
strong; as, tough sinews. - Not easily separated; viscous; clammy; tenacious; as,
tough phlegm. - Stiff; rigid; not flexible; stubborn; as, a tough bow.