Strong's #4457: porosis (pronounced po'-ro-sis)

from 4456; stupidity or callousness:--blindness, hardness.

Thayer's Greek Lexicon:

́

pōrōsis

1) the covering with a callus

2) obtrusiveness of mental discernment, dulled perception

3) the mind of one has been blunted

3a) of stubbornness, obduracy

Part of Speech: noun feminine

Relation: from G4456

Citing in TDNT: 5:1025, 816

Usage:

This word is used 3 times:

 

Mark 3:5: "being grieved for the hardness of their hearts, he saith unto the"
Romans 11:25: "in your own conceits; that blindness in part is happened to Israel,"
Ephesians 4:18: "them, because of the blindness of their heart:"