'Bitterness' in the Bible

"Therefore, I will not refrain my mouth; I will speak in the anguish of my spirit; I will complain in the bitterness of my soul.

He does not allow me to recover my breath, for he fills me with bitterness.

"I am weary of my life; I will complain without restraint; I will speak in the bitterness of my soul.

And another man dies in bitterness of soul, never having tasted anything good.