fail-safe
词形变化：
动词过去式: fail-safed | 动词过去分词: fail-safed | 动词现在分词: fail-safing | 动词第三人称单数: fail-safes |
同义词：
flunk | fade | weaken | lose | neglect | fall short | decline | fall | break down | nose-dive | bomb | pack up | crash | go bankrupt | go out of business | let down | disappoint | languish | abort | flop | lessen | collapse | droop | lose out | out | pine | miss | founder | tire | lower | be | unsuccessful | short | give out | die | run out | go wrong | break | go bad | conk out | go | flush it | give way | betray | miscarry |
反义词：