The term 'DON'T LET GO!' can be expressed in four different ways using crossword solutions. The first solution is KEEP, which is a four letter word meaning to maintain possession of something or to not let go. The second solution is HANGON, which is a six letter word meaning to remain in a certain position or to not let go. The third solution is HOLDTIGHT, which is a nine letter word meaning to firmly grasp something or to not let go. The fourth solution is HOLDONTIGHT, which is an eleven letter word meaning to KEEP a firm grip on something or to not let go. All of these solutions emphasize the importance of not letting go.