back (the back of people, animals, or objects)

(literally) to tighten one's belt

(anatomy) the lower back / (chiefly Northern Vietnam, clothing) a belt

belt (worn around the waist)

(of tears) welling up in one's eyes

(figuratively, often derogatory) to be supported or backed by a powerful entity (often from the shadow) so that one can get away with cheating or financial doping

(figurative, economics, government) to tighten one's belt, or more extremely, to be forced into austerity by the government

(idiomatic, literally) a long back wastes cloth / (idiomatic, figuratively) lazy, clumsy, useless, idle, unwilling to do physical work

(literally) to pull one's shirt up so that people can see one's back / (figurative) to air one's dirty laundry in public