G4645–σκληρύνω–sklērunō

But when some were hardened and disobedient, speaking evil of the Way before the multitude, he departed from them, and separated the disciples, reasoning daily in the school of Tyrannus.

ἐσκληρύνοντο esklērunonto “were hardened”

So then he hath mercy on whom he will, and whom he will be hardeneth.

σκληρύνει. sklērunei “He hardens.”

Harden not your hearts, as in the provocation, Like as in the day of the trial in the wilderness,

σκληρύνητε sklērunēte “shall harden”

but exhort one another day by day, so long as it is called To-day; lest any one of you be hardened by the deceitfulness of sin:

σκληρυνθῇ sklērunthēa “may be hardened”

while it is said, To-day if ye shall hear his voice, Harden not your hearts, as in the provocation.

σκληρύνητε sklērunēte “shall harden”

he again defineth a certain day, To-day, saying in David so long a time afterward (even as hath been said before), To-day if ye shall hear his voice, Harden not your hearts.

σκληρύνητε sklērunēte “shall harden”