FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

alaletos ἀλάλητος — al-al'-ay-tos — from 1 (as a negative particle) and a derivative of 2980; unspeakable:--unutterable, which cannot be uttered.

see GREEK for 1

see GREEK for 2980