Definition: FPPX01 refers to a term in the Bible that translates to "bitterness of heart" or "a bitter taste." It's used as a metaphor for bitterness, jealousy, anger, or sorrow, often in connection with events that are difficult and unpleasant to bear. The word is typically found in Old Testament texts such as Psalms 23:3 where it signifies the emotional state of someone who feels resentment or malice towards others.