Unbecoming
/ˌʌnbɪˈkʌmɪŋ/
verb
To misbecome.
noun
The process by which something unbecomes.
adjective
Not flattering, attractive or appropriate.
“She wore a rather unbecoming hairstyle.”
Not in keeping with the expected standards of one's position.
“He was accused of conduct unbecoming an officer and a gentleman.”
Synonyms: improper, indecent, indecorous, unfit, unsuitable