adj. 25B6; adjective
a spent force : USED UP, consumed, exhausted, finished, depleted, drained; informal burnt out.
that's enoughI'm spent : EXHAUSTED, tired (out), weary, worn out, dog-tired, on one's last legs, drained, fatigued, ready to drop; informal done in, all in, dead on one's feet, dead beat, bushed, wiped out, frazzled; Brit. informal knackered, whacked; N. Amer. informal pooped, tuckered out.