G4457–πώρωσις–pōrōsis

And having looked round upon them with anger, being grieved for the hardness of their heart, he saith to the man, `Stretch forth thy hand;' and he stretched forth, and his hand was restored whole as the other;

πωρώσει pōrōsei “hardness”

For I do not wish you to be ignorant, brethren, of this secret -- that ye may not be wise in your own conceits -- that hardness in part to Israel hath happened till the fulness of the nations may come in;

πώρωσις pōrōsis “a hardening”

being darkened in the understanding, being alienated from the life of God, because of the ignorance that is in them, because of the hardness of their heart,

πώρωσιν pōrōsin “hardness”