Effable is a 7 letter English word. It's valid Scrabble word worth 15 points. It's valid Words with friends word worth 17 points.
You can make 89 anagrams from letters in effable (abeeffl).
1630-40; French Latin effābilis, equivalent to eff(ārī) to speak out (ef- ef- + fārī to speak) + -ābilis -able
We have architects and no tects; there are things which are ineffable and none which are effable.