The crossword solution for the term 'Bitter Ender' is 'NESS'. The term 'Bitter Ender' is used to describe someone who is determined to continue a struggle or fight until the very end, no matter how difficult or unpleasant the situation may be. The term is derived from the nautical phrase 'to the bitter end', which refers to the rope that is tied to the anchor and runs through the hawsehole to the deck of a ship. This phrase is used to describe someone who is willing to go to any lengths to achieve their goal.