v.
1. a tr. cause (a cloud, vapour, fear, darkness, etc.) to disappear or disperse. b intr. disperse, scatter, disappear.
2 intr. & tr. break up; bring or come to nothing.
3 tr. squander or fritter away (money, energy, etc.).
4 intr. (as dissipated adj.) given to dissipation, dissolute.
Derivatives:
dissipater n. dissipative adj. dissipator n.
Etymology: L dissipare dissipat- (as DIS-, sipare (unrecorded) throw)