G4645–σκληρύνω–sklērunō

and when certain were hardened and were disbelieving, speaking evil of the way before the multitude, having departed from them, he did separate the disciples, every day reasoning in the school of a certain Tyrannus.

ἐσκληρύνοντο esklērunonto “were hardened”

so, then, to whom He willeth, He doth kindness, and to whom He willeth, He doth harden.

σκληρύνει. sklērunei “He hardens.”

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

σκληρύνητε sklērunēte “shall harden”

but exhort ye one another every day, while the To-day is called, that none of you may be hardened by the deceitfulness of the sin,

σκληρυνθῇ sklērunthēa “may be hardened”

in its being said, `To-day, if His voice ye may hear, ye may not harden your hearts, as in the provocation,'

σκληρύνητε sklērunēte “shall harden”

again He doth limit a certain day, `To-day,' (in David saying, after so long a time,) as it hath been said, `To-day, if His voice ye may hear, ye may not harden your hearts,'

σκληρύνητε sklērunēte “shall harden”