unnecessary

a.没必要的，多余的

unman, unmanageable, unmanly, unmanned, unmannerly, unmarried, unmask, unmatched, unmentionable, unmentionables, unmerchantable, unmindful, unmistakable, unmistakably, unmitigated, unmoved, unmoving, unnatural, unnaturally, unnecessarily, unnerve, unnerving, unnoteworthy, unnoticed, unnumbered, UNO, unobjectionable, unobservable, unobserved, unobstructed, unobtainable, unobtrusive, unobtrusively, unoccupied, unofficial, unofficially, unoriginal, unorthodox, unorthodoxy, unpack,