(~s, dissipating, ~d)
1.
When something ~s or when you ~ it, it becomes less or becomes less strong until it disappears or goes away completely. (FORMAL)
The tension in the room had ~d...
He wound down the windows to ~ the heat.
VERB: V, V n
2.
When someone ~s money, time, or effort, they waste it in a foolish way. (FORMAL)
He is dissipating his time and energy on too many different things...
VERB: V n