Strong's Greek #215
ἀλαλήτοις

Englishman's Concordance (References)

ἀλαλήτοις alalētois — 1 Occurrence

Romans 8:26 - Adj-DMP
GRK:ὑπερεντυγχάνει στεναγμοῖς ἀλαλήτοις
NAS: for [us] with groanings too deep for words;
KJV: with groanings which cannot be uttered.
INT: makes intercession with groanings inexpressable