'Bitter' in the Bible

Now Herod [Agrippa I] was extremely angry with the people of Tyre and Sidon; and their delegates came to him in a united group, and after persuading Blastus, the king’s chamberlain [to support their cause], they asked for peace, because their country was fed by [imports of grain and other goods from] the king’s country.

And I often punished them [making them suffer] in all the synagogues and tried to force them to blaspheme; and in my extreme rage at them, I kept hunting them even to foreign cities [harassing and persecuting them].