1. collect into a mass.   Hint First letter clue   2. stir up by shock or vitalize suddenly.   First letter clue   3. hide or disguise.   First letter clue   4. establish validity or prove genuine.   First letter clue   5. seal seams to make watertight.   First letter clue   6. grow bud or shoot.   First letter clue   7. slow down.   First letter clue