Strong's Concordance

Original word: σκληρύνω
Transliteration: sklérunó
Definition (short): harden
Definition (full): to harden

NAS Exhaustive Concordance

Word Origin: from skléros
Definition: to harden
NASB Translation: becoming hardened (1), harden (3), hardened (1), hardens (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
Copyright © 1981, 1998 by The Lockman Foundation.
All rights reserved Lockman.org

Strong's Exhaustive Concordance

From skleros; to indurate, i.e. (figuratively) render stubborn -- harden.

see GREEK skleros

KJV: But when divers were hardened, and believed not, but spake evil of that way before the multitude, he departed from them, and separated the disciples, disputing daily in the school of one Tyrannus.
NASB: But when some were becoming hardened and disobedient, speaking evil of the Way before the people, he withdrew from them and took away the disciples, reasoning daily in the school of Tyrannus.
KJV: Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
NASB: So then He has mercy on whom He desires, and He hardens whom He desires.
KJV: Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:
NASB: DO NOT HARDEN YOUR HEARTS AS WHEN THEY PROVOKED ME, AS IN THE DAY OF TRIAL IN THE WILDERNESS,
KJV: But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.
NASB: But encourage one another day after day, as long as it is still called "Today," so that none of you will be hardened by the deceitfulness of sin.
KJV: While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.
NASB: while it is said, "TODAY IF YOU HEAR HIS VOICE, DO NOT HARDEN YOUR HEARTS, AS WHEN THEY PROVOKED ME."