Verb sklērynō (to harden) in the New Testament

(Translation from NRSV for the New Testament with a few modifications for a more litteral meaning)


Acts

19: 9When some were hardening (sklērynō) and refusing to believe, speaking evil of the Way before the congregation, he left them, taking the disciples with him, and argued daily in the lecture hall of Tyrannus.

Romans

9: 18So then he has mercy on whomever he chooses, and he hardens (sklērynō) the heart of whomever he chooses.

Hebrews

3: 8do not harden (sklērynō) your hearts as in the rebellion, as on the day of testing in the wilderness,
3: 13But exhort one another every day, as long as it is called "today," so that none of you may be hardened (sklērynō) by the deceitfulness of sin.
3: 15As it is said, "Today, if you hear his voice, do not harden (sklērynō) your hearts as in the rebellion."
4: 7again he sets a certain day - "today" - saying through David much later, in the words already quoted, "Today, if you hear his voice, do not harden (sklērynō) your hearts."