The crossword solution for the term 'Word in a Grimm Ending' is EVER, which is a four-letter word. The Brothers Grimm were German authors who wrote a collection of folk tales known as 'Grimm's Fairy Tales'. These stories often had dark and tragic endings, so the term 'Word in a Grimm Ending' refers to a word that would be used in such an ending. The answer to this crossword is EVER, which could be used to describe something that lasts forever or something that will never end.