'Bitter' in the Bible

And he was in bitter hostility with the Tyrians and Sidonians; but they came to him with one accord, and, having gained Blastus the king's chamberlain, sought peace, because their country was nourished by the king's.

Husbands, love your wives, and be not bitter against them.

Does the fountain, out of the same opening, pour forth sweet and bitter?

but if ye have bitter emulation and strife in your hearts, do not boast and lie against the truth.

And the name of the star is called Wormwood; and the third part of the waters became wormwood, and many of the men died of the waters because they were made bitter.

And I went to the angel, saying to him to give me the little book. And he says to me, Take and eat it up: and it shall make thy belly bitter, but in thy mouth it shall be sweet as honey.

And I took the little book out of the hand of the angel, and ate it up; and it was in my mouth as honey, sweet; and when I had eaten it my belly was made bitter.