not in keeping with accepted standards of what is right or proper in polite society;
"was buried with indecent haste" "indecorous behavior" "language unbecoming to a lady" "unseemly to use profanity" "moved to curb their untoward ribaldry"
例句
用作形容词(adj.)
Everyone was shocked by his unseemly conduct.大家都被他不得体的举动震惊了。
His social position allows him of no unseemly behaviour in public.他的社会地位不容许他在公共场合有行为不妥之处。