debilitated russian

• осла́бленный

  weakened, enfeebled, debilitated

  slackened, loosened, slack

• подко́шенный

  mown down, cut down

  weakened, debilitated, undermined, knocked off one's feet

• обесси́левший

  exhausted, worn out, powerless, debilitated

• обессиленный

  exhausted, weakened, enervated, debilitated