unbecoming (adj.)
- awkward
- cheap
- chintzy
- clumsy
- debasing
- degrading
- demeaning
- deplorable
- disgraceful
- gauche
- humiliating
- ill-chosen
- ill-sorted
- ill-timed
- improper
- inadmissible
- inapplicable
- inapposite
- inappropriate
- inapt
- indecent
- indecorous
- indelicate
- indiscreet
- inelegant
- inept
- infelicitous
- irrelevant
- maladjusted
- maladroit
- malapropos
- malodorous
- mismatched
- mismated
- misplaced
- offensive
- opprobrious
- outrageous
- pitiful
- rough
- sad
- scandalous
- shameful
- shocking
- sorry
- tasteless
- unadapted
- unbefitting
- undignified
- undue
- unfit
- unfitting
- ungentlemanly
- ungodly
- unladylike
- unqualified
- unseasonable
- unseemly
- unsuitable
- unsuited
- untimely
- untoward
- vulgar