enervated

indolent, lazy, slothful

dull, lethargic, logy (also loggy), sleepy, sluggish, torpid

exhausted, knackered [British], tired, weary

feeble, frail, weak

apathetic, impassive, indifferent, phlegmatic, stolid

careless, heedless, thoughtless, unwary

inactive, inert

challenged, disabled, incapacitated, invalid

paralyzed

broken-down, decrepit

impotent, powerless

breakable, flimsy, fragile

dizzy, groggy, rocky, unsteady, woozy

drained, exhausted, flagging, tired, weary, worn-out

damaged, harmed, hurt, impaired, injured, lame, unsound

resistless, susceptible, unresistant, vulnerable, yielding