Abbott-Smith Manual Greek Lexicon
ἀκλινής (G186)
1 ** ἀκλινής , -ές ( κλίνω ), [in LXX: IV Mac 6:7 17:3 *;] unbending , firm : metaph. (MM, VGT , s.v.). He 10:23 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain