FROM STRONG’S GREEK DICTIONARY (1890)

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

aneklaletos ἀνεκλάλητος — an-ek-lal'-ay-tos — from 1 (as a negative particle) and a presumed derivative of 1583; not spoken out, i.e. (by implication) unutterable:--unspeakable.

see GREEK for 1

see GREEK for 1583