The term 'die away' can be described by the crossword solutions of 'EBB, ' 'ABATE, ' 'FADE, ' and 'LETUP.' EBB is a verb meaning to gradually decrease or diminish, while ABATE means to reduce in intensity or degree. FADE is another verb meaning to gradually become weaker or less intense, and LETUP is a noun meaning a decrease in intensity or activity. All of these words describe the process of something dying away, which is the gradual weakening or disappearance of something over time.