'Bitter' in the Bible

Why do you make me see evil-doing, and why are my eyes fixed on wrong? for wasting and violent acts are before me: and there is fighting and bitter argument.

For see, I am sending the Chaldaeans, that bitter and quick-moving nation; who go through the wide spaces of the earth to get for themselves living-places which are not theirs.

Will not all these take up a word of shame against him and a bitter saying against him, and say, A curse on him who goes on taking what is not his and is weighted down with the property of debtors!