G4456
πωρόω
to harden
πωρόω, -ῶ (πῶρος, 1. a stone. 2. a callus) [in LXX: Job.17:7 B(כָּהָה), Pro.10:20 A * ;] to petrify, harden, form a callus. Metaphorical, π. τ. καρδίαν, Jhn.12:40. Pass., Rom.11:7; τ. νοήματα, 2Co.3:14; ἡ καρδία, Mrk.6:52 8:17 † (AS)
The KJV translates G4456 in the following manner:
hardened (6x), blinded (4x)
Full Thayer's lexicon entry
πωρόω — pōróō
πωρόω, πώρω: 1 aorist ἐπωρωσα (Joh 12:40 T Tr WH); perfect πεπώρωκα; perfect passive participle πεπωρωμενος; 1 aorist passive ἐπωρωθην; (πῶρος, hard skin, a hardening, induration); to cover with a thick skin, to harden by covering with a callus (R. V. everywhere simply to harden): metaphorically, καρδίαν, to make the heart dull, Joh 12:40; passive, to grow hard or callous, become dull, lose the power of understanding: Rom 11:7; τά νοήματα, 2Co 3:14; ἡ καρδία, Mar 6:52; Mar 8:17. Cf. Fritzsche, Commentary on Mark, p. 78f; on Romans, ii., p. 451f. ((Hippocrates, Aristotle, others.))
5 occurrences
Mark (2), John (1), Romans (1), II Corinthians (1)