Strong's #4645: skleruno (pronounced sklay-roo'-no)

from 4642; to indurate, i.e. (figuratively) render stubborn:--harden.

Thayer's Greek Lexicon:

́

sklērunō

1) to make hard, harden

2) metaphorically

2a) to render obstinate, stubborn

2b) to be hardened

2c) to become obstinate or stubborn

Part of Speech: verb

Relation: from G4642

Citing in TDNT: 5:1030, 816

Usage:

This word is used 6 times:

 

Acts 19:9: "But when divers were hardened, and believed not, but spake evil of that way"
Romans 9:18: "he will have mercy, and whom he will he hardeneth."
Hebrews 3:8: " Harden not your hearts, as in the provocation,"
Hebrews 3:13: "is called Today; lest any of you be hardened through the deceitfulness"
Hebrews 3:15: "ye will hear his voice, harden not your hearts, as"
Hebrews 4:7: "ye will hear his voice, harden not your hearts."