挫折 （ザセツ） setback, failure (e.g. plans, business), frustration, discouragement

挫傷 （ザショウ） sprain, wrench, bruise, contusion, fracture

頓挫 （トンザ） setback, deadlock, standstill, impasse, miscarriage

挫く （くじく） to sprain, to twist, to dampen (enthusiasm), to discourage, to dishearten, to dispirit, to depress, to unnerve, to crush

挫ける （くじける） to be disheartened, to lose heart, to be dispirited, to be crushed (emotionally), to be sprained, to be snapped, to be broken