'Bitter' in the Bible

and made their lives bitter with difficult labor in brick and mortar and in all kinds of fieldwork. They ruthlessly imposed all this work on them.

They are to eat the meat that night; they should eat it, roasted over the fire along with unleavened bread and bitter herbs.

They came to Marah, but they could not drink the water at Marah because it was bitter—that is why it was named Marah.