Abbott-Smith Manual Greek Lexicon
ἀ-λάλητος (G215)
1 † ἀ-λάλητος , -ον ( λαλέω ), inexpressible , not to be uttered : Ro 8:26 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain
Strong's G215 · Greek
ἀλάλητος
alaletos · al-al'-ay-tos
from 1 (as a negative particle) and a derivative of 2980; unspeakable