weak kneed

53 Moby Thesaurus words for "weak kneed":
      abulic, afraid, chicken, chickenhearted, coward, cowardly, cowed,
      daunted, dismayed, double-minded, faint, fainthearted, faltering,
      fearful, feeble, feebleminded, frail, funking, funky, henhearted,
      infirm, intimidated, invertebrate, irresolute, lily-livered,
      milk-livered, milksoppish, milksoppy, mousy, overtimid,
      overtimorous, panic-prone, panicky, pigeonhearted, pliable,
      rabbity, sissified, sissy, soft, spineless, timid, timorous,
      uncertain, unmanly, unmanned, wavering, weak, weak-minded,
      weak-willed, weakhearted, white-livered, wobbly, yellow