unfamiliar

a.不熟悉的；不常见的

unevenly, unevenness, unexamined, unexceptionable, unexceptionably, unexceptional, unexceptionally, unexpected, unexpectedly, unexpectedness, unexplained, unfading, unfailing, unfailingly, unfair, unfairly, unfairness, unfaithful, unfaithfully, unfaithfulness, unfamiliarity, unfashionable, unfasten, unfathomable, unfavorable, unfeeling, unfeelingly, unfeigned, unfeignedly, unfettered, unfinished, unfit, unflagging, unflaggingly, unflappability, unflappable, unflinching, unflinchingly, unfocused, unfold,