G4457–πώρωσις–pōrōsis

And looking round on them he was angry, being sad because of their hard hearts; and he said to the man, Put out your hand. And he put it out, and his hand was made well.

πωρώσει pōrōsei “hardness”

For it is my desire, brothers, that this secret may be clear to you, so that you may not have pride in your knowledge, that Israel has been made hard in part, till all the Gentiles have come in;

πώρωσις pōrōsis “a hardening”

Whose thoughts are dark, to whom the life of God is strange because they are without knowledge, and their hearts have been made hard;

πώρωσιν pōrōsin “hardness”