G4457–πώρωσις–pōrōsis

And looking round upon them with anger, distressed at the hardening of their heart, he says to the man, Stretch out thy hand. And he stretched [ergänzt: it] out, and his hand was restored.

πωρώσει pōrōsei “hardness”

For I do not wish you to be ignorant, brethren, of this mystery, that ye may not be wise in your own conceits, that blindness in part is happened to Israel, until the fulness of the nations be come in;

πώρωσις pōrōsis “a hardening”

being darkened in understanding, estranged from the life of God by reason of the ignorance which is in them, by reason of the hardness of their hearts,

πώρωσιν pōrōsin “hardness”