Synonyms of unmentionable in English:

unmentionable


See definition of unmentionable

adjective

1‘sex was the unmentionable subject’

SYNONYMS

taboo, censored, forbidden, banned, interdicted, proscribed, prohibited, not to be spoken of, ineffable, unspeakable, unutterable, unprintable, indescribable, out of bounds, beyond the pale, off limits, that dare not speak its name, disapproved of, frowned on

offensive, embarrassing, shocking

indecent, indecorous, rude, immodest, impolite

scandalous, disgraceful, appalling, shameful, obscene, filthy

informal no go