'Bitterness' in the Bible

He will make the woman drink the bitter water that brings a curse, and the water that brings a curse will enter her to produce bitterness.

When he has made her drink the water, then, if she has defiled herself and behaved unfaithfully toward her husband, the water that brings a curse will enter her to produce bitterness -- her abdomen will swell, her thigh will fall away, and the woman will become a curse among her people.