G4645–σκληρύνω–sklērunō

But when some were hardened and disbelieved, speaking evil of the way before the multitude, he left them and separated the disciples, reasoning daily in the school of Tyrannus.

ἐσκληρύνοντο esklērunonto “were hardened”

So then, to whom he will he shews mercy, and whom he will he hardens.

σκληρύνει. sklērunei “He hardens.”

harden not your hearts, as in the provocation, in the day of temptation in the wilderness;

σκληρύνητε sklērunēte “shall harden”

But encourage yourselves each day, as long as it is called To-day, that none of you be hardened by the deceitfulness of sin.

σκληρυνθῇ sklērunthēa “may be hardened”

in that it is said, To-day if ye will hear his voice, do not harden your hearts, as in the provocation;

σκληρύνητε sklērunēte “shall harden”

again he determines a certain day, saying, in David, 'To-day,' after so long a time; (according as it has been said before), To-day, if ye will hear his voice, harden not your hearts.

σκληρύνητε sklērunēte “shall harden”