unserviceable

adj (abbrs 缩写 US, u/s) (fml or joc 文或谑) that cannot be used because worn out, broken, etc （因破旧、 损坏等）不能使用的: an unserviceable bicycle, telephone, tin-opener, etc 已不能用的自行车、 电话机、 开罐器等.

unsalable, unsatisfactory, unsaturated, unsavoury (US unsavory), unsay, unscathed, unscented, unschooled, unscientific, unscramble, unscrew, unscripted, unscrupulous, unscrupulously, unscrupulousness, unseat, unseemliness, unseemly, unseen, unselfish, unsettle, unsettled, unsettling, unshakable, unshakeable, unsightliness, unsightly, unsinkable, unskilled, unskillful, unsmiling, unsociable, unsocial, unsold, unsolicited, unsolved, unsophisticated, unsound, unsparing, unsparingly,