to dispel (something) or cause it to disappear or scatter
The walk soon dissipated his resentment
to spend or use up (money, energy, etc) aimlessly or foolishly
to cause (energy) to be lost on its conversion to heat
to separate and scatter, or fade away and vanish
dissipater noun
dissipative /-tiv/ adj
dissipator noun
[Latin dissipatus, past part. of dissipare disperse, from dis- + supare to throw]