curve, crease, crook, stoop, plication, fold, twist, crouch, flexure, flexion, more...

straighten, unbend, stiffen, extend, flatten

U-bend, P-trap, S-bend, offset, more...

sharp, great, next, slight, first, big, last, sudden, deep, second, double

to stoop,   turn in the road,   heraldic band,   to flex,   to make flexible,   doubling over,   to curve,   lean over someone,   bow him over,   to turn a corner