'Inner' in the Bible

Therefore my {heart moans} like harp for Moab and my inner parts for Kir-heres.

An oracle of Egypt: Look! Yahweh [is] riding on a swift cloud and [is] coming [to] Egypt. And the idols of Egypt will tremble in front of him, and the heart of Egypt melts in his inner parts.

And it shall be as when the hungry person dreams--look, [he is] eating! And he wakes up and his inner self [is] empty. Or as when the thirsty person dreams--look, [he is] drinking! And he wakes up and look, [he is] faint, and his inner self [is] longing for water. So shall be the multitude of all the nations who fight against Mount Zion.