G4644
σκληροτράχηλος
stiff-necked
σκληρο-τράχηλος, -ον (σκληρός, τράχηλος), [in LXX: Exo.33:3, 5 (עֹרֶף ־קָשֶׁה), etc. ;] stiff-necked: metaphorically, Act.7:51.† (AS)
The KJV translates G4644 in the following manner:
stiffnecked (2x)
Full Thayer's lexicon entry
σκληροτράχηλος — sklērotráchēlos
σκληροτράχηλος, σκληροτράχηλόν (σκληρός and τράχηλος), properly, stiff-necked; tropically, stubborn, headstrong, obstinate: Act 7:51; the Sept. for עֹרֶף קְשֵׁה, Exo 33:3; Exo 33:5; Exo 34:9; (etc.); Bar 2:30; Sir 16:11; (cf. σκληροτραχηλια, Test xii. Patr., test. Sym. § 6). Not found in secular authors; (cf. Winer's Grammar, 26, 99 (94)).
1 occurrence