1) Banned 2) English phrase 3) Excluded from use or mention 4) Forbidden 5) Forbidden by law 6) Illegal 7) Illicit 8) Impermissible 9) Not allowed 10) Outlawed 11) Proscribed 12) Taboo 13) Tabu 14) Verboten Found on https://www.crosswordclues.com/clue/prohibited