unthreatening

a. 没有威胁的

unstop, unstoppable, unstuck, unstudied, unsubstantiated, unsuccessful, unsuitable, unsung, unsure, unsuspecting, unswerving, unsympathetic, untainted, untalented, untangle, untapped, untenable, unthinkable, unthinking, unthinkingly, untidily, untidiness, untidy, untie, until, until (also till), untimeliness, untimely, untired, untiring, untiringly, untitled, untold, untouchable, untouched, untoward, untrammelled (US also untrammeled), untreated, untried, untrue,