unbecoming

Synonyms: awkward clumsy discreditable gauche ill-suited inappropriate inapt incongruous indecent indecorous indelicate inept maladroit malapropos offensive rough salacious tacky tasteless unattractive unbefitting uncomely undue unfair unfit unfitting unflattering ungodly unhandsome unlovely unseasonable unseemly unsightly unsuited untimely untoward unworthy

Antonyms: acceptable becoming fitting proper seemly suitable