unmentionable (n.)
unmentionable (adj.)
- abject
- abominable
- appalling
- arrant
- atrocious
- base
- beggarly
- cheesy
- contemptible
- crummy
- debased
- degraded
- depraved
- despicable
- dirty
- disgraceful
- disgusting
- dishonorable
- execrable
- filthy
- flagrant
- forbidden
- foul
- fulsome
- grave
- gross
- heinous
- immodest
- indecent
- indefinable
- indescribable
- ineffable
- inexpressible
- little
- low
- low-down
- lumpen
- mangy
- mean
- measly
- miserable
- monstrous
- nefarious
- noncommunicable
- obnoxious
- obscene
- odious
- paltry
- petty
- poky
- poor
- rank
- reptilian
- scabby
- scandalous
- scrubby
- scruffy
- scummy
- scurvy
- shabby
- shameful
- shocking
- shoddy
- small
- squalid
- taboo
- undefinable
- unnameable
- unspeakable
- unutterable
- vile
- wretched
