unsound

a. 不健全的,有病的,不可靠的, 错误的,腐烂的

unseen, unselfish, unserviceable, unsettle, unsettled, unsettling, unshakable, unshakeable, unsightliness, unsightly, unsinkable, unskilled, unskillful, unsmiling, unsociable, unsocial, unsold, unsolicited, unsolved, unsophisticated, unsparing, unsparingly, unspeakable, unspeakably, unspoiled, unspoken, unspotted, unstable, unsteadily, unsteadiness, unsteady, unstinting, unstintingly, unstop, unstoppable, unstuck, unstudied, unsubstantiated, unsuccessful, unsuitable,