Quick Definition
σκληροκαρδία, ας, ἡ n.f. hardness of heart
Strong's Definition
hard-heartedness, i.e. (specially), destitution of (spiritual) perception
Derivation: feminine of a compound of G4642 (σκληρός) and G2588 (καρδία);
KJV Usage: hardness of heart
UBS Dictionary of the Greek New Testament
noun, f. | -ας | σκληρύνω + καρδία
88.224 · Moral and Ethical Qualities and Related Behavior · Stubbornness
stubborn, completely unyielding pertaining to being obdurate and obstinate In the contexts illustrated by σκληροτράχηλος, ἀπερίτμητος καρδίᾳ καὶ τοῖς ὠσίν, and σκληροκαρδία, the focus of the stubbornness and obstinacy is the unwillingness to be taught or to understand.
1 The series of expressions in 88.224 appears to differ somewhat in intensity from σκληρότης stubbornness (88.223).
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
σκληρο-καρδία, -as, ἡ, (σκληρύς and καρδία), a bibl. word, the characteristic of one who is σκληρὸς τὴν καρδίαν (Prov. xxviii. 14), or σκληροκάρδιος (Proy. xvii. 20; Ezek. iii. 7); hardness of heart: Mt. xix. 8; Mk. x. 5; xvi. 14; for 329 ny, Deut. x. 16; Jer.iv.4; Sir. xvi. 10; καρδία σκληρά, Sir. iii. 26,27. [Cf W. 26, 99 (94).]
Mounce Concise Greek Dictionary
σκληροκαρδία sklērokardia 3x
hardness of heart, obstinacy, perverseness, Mt. 19:8; Mk. 10:5; 16:14*
Abbott-Smith Greek Lexicon
† σκληρο-καρδία, -ας, ἡ
(< σκληρός, καρδία), [in LXX: De 10:16, Je 4:4 (לֵבָב עׇרְלָה), Si 16:10 (cf. καρδία σκληρά, ib. 3:26, 27) * ;]
hardness of heart: Mt 19:8, Mk 10:5 16:[14].†
Liddell-Scott-Jones — Greek-English Lexicon
σκληροκαρδία (sklērokardia) — hardness of heart. σκληρο-καρδία, ἡ, hardness of heart, [LXX+NT]