lost
pt, pp of lose.
adj
  1. that cannot be found or recovered 失去的; 丧失的; 遗失的; 无法恢复的: recalling her lost youth 回忆她失去的青春 * The art of good conversation seems lost. 高雅谈吐的艺术似已不复存在. * lost tribes of Africa 非洲消失的部落.
  2. [esp pred 尤作表语] (fig 比喻) confused or puzzled 不知所措; 困惑: I got rather lost trying to find the station. 我找车站找得晕头转向. * We would be totally lost without your help. 我们没有你的帮助就一筹莫展. * They spoke so quickly I just got lost. 他们说得那麽快, 我都糊涂了.
  3. (idm 习语) ,all is not `lost (saying 谚) there is still some hope of success, recovery, etc 尚有一线（成功、 恢复等的）希望.

(via 牛津现代英汉双解词典)

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