G4457
πώρωσις
hardening
πώρωσις, -εως, ἡ (πωρόω), a covering with a callus, a hardening: metaphorically, Mrk.3:6, Rom.11:2, Eph.4:18.† (AS)
The KJV translates G4457 in the following manner:
blindness (4x), hardness (2x)
Full Thayer's lexicon entry
πώρωσις — pṓrōsis
πώρωσις, πωρωσεως, ἡ (πωρόω, which see), properly, the covering with a callus; tropically, obtuseness of mental discernment, dulled perception: γέγονε τίνι, the mind of one has been blunted (R. V. a hardening hath befallen), Rom 11:25; τῆς καρδίας (hardening of heart), of stubbornness, obduracy, Mar 3:5; Eph 4:18. ((Hippocrates))
3 occurrences
Mark (1), Romans (1), Ephesians (1)