Effable

• (a.) Capable of being uttered or explained; utterable.
Found on http://thinkexist.com/dictionary/meaning/effable/

Effable

Ef'fa·ble adjective [ Latin effabilis ; ex out + fari to speak.] Capable of being uttered or explained; utterable. Barrow.
Found on http://www.encyclo.co.uk/webster/E/10

effable

capable of being expressed
Found on http://phrontistery.info/e.html
No exact match found