unbecoming
adj. 不适当的，不相称的；不合身的，不得体的
例句
She was wearing an unbecoming shade of purple.
她穿着一身不相配的紫色衣服。
《牛津词典》
He was accused of conduct unbecoming to an officer.
他被谴责行为有失官员身份。
Austin displayed conduct unbecoming of an officer and a gentleman.
奥斯汀的行为不符合军官和绅士的身份。
《柯林斯英汉双解大词典》
