'Bitter' in the Bible

When she came to the mountain to the man of God, she took hold of his feet. Gehazi approached to push her away; but the man of God said, “Let her alone, for her soul is desperate and troubled within her; and the Lord has hidden the reason from me and has not told me.”

For the Lord saw the affliction (suffering) of Israel as very bitter; there was no one left, bond or free, nor any helper for Israel.