unsuccessful
词形变化：
副词: unsuccessfully | 名词: unsuccess-fulness |
同义词：
abortive | fruitless | unfortunate | failing | vain | futile | ineffectual | ineffective | failed | unproductive | disastrous | stillborn |
反义词：
词义辨析：
同义:
a.不成功的; 失败的
failing
unfortunate
abortive
fruitless
同义参见:
vain
ineffectual
futile
反义:
a.不成功的
successful