'Bitterly' in the Bible

Just as he finished his comments, the king's sons arrived, crying loudly. At this, with tears overflowing, the king and his entire staff wept bitterly.

Deeply shaken, the king went up to the chamber overlooking the city gate, weeping bitterly and crying out as he went along, "My son Absalom! My son! My son Absalom! I wish I had died instead of you, Absalom my son, my son!"

Someone informed Joab, "The king is weeping bitterly, mourning for Absalom."