The term 'die down' can be used to describe a gradual DECREASE in intensity or activity. This can be expressed in various ways, such as 'DECREASE' (8 letters), 'LULL' (4 letters), 'DWINDLE' (7 letters), 'ABATE' (5 letters), 'SUBSIDE' (7 letters), 'WANE' (4 letters), 'EBB' (3 letters), 'FADE' (4 letters), 'FADEOUT' (7 letters), and 'blowover' (8 letters). All of these words refer to a gradual DECREASE in intensity or activity, and can be used to describe the term 'die down'.