unsuccessful

a.不成功的，失败的；无用的，无益的；无成就的

unsophisticated, unsound, unsparing, unsparingly, unspeakable, unspeakably, unspoiled, unspoken, unspotted, unstable, unsteadily, unsteadiness, unsteady, unstinting, unstintingly, unstop, unstoppable, unstuck, unstudied, unsubstantiated, unsuitable, unsung, unsure, unsuspecting, unswerving, unsympathetic, untainted, untalented, untangle, untapped, untenable, unthinkable, unthinking, unthinkingly, unthreatening, untidily, untidiness, untidy, untie, until,