unknown

a.未知的，不知名的

United States, unitedly, unity, Univ, universal, universality, universally, universe, university, univocal, unjust, unjustifiable, unjustifiably, unjustly, unkempt, unkind, unkindly, unkindness, unknowing, unknowingly, unlace, unladen, unlatch, unlawful, unlawfully, unlearn, unlearned, unleash, unleavened, unless, unlettered, unlicensed, unlike, unlikely, unlimited, unlined, unlisted, unliterary, unload, unlock,