To dissipate is to disperse or fade away — as a bad smell will dissipate (usually) if you wait long enough.

Dissipate can also mean “spend or use wastefully.” If you win the lottery, you might suddenly find yourself with a group of new friends encouraging you to dissipate your money (on them). Note that dissipate can be used with or without an object: "Once you dissipate your wealth, your new group of friends will dissipate without a trace."

Definitions of dissipate
  1. verb
    cause to separate and go in different directions
    synonyms: break up, dispel, disperse, scatter
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    cause to break up or cease to function
    type of:
    divide, separate
    make a division or separation
  2. verb
    move away from each other
    synonyms: disperse, scatter, spread out
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    aerosolise, aerosolize
    become dispersed as an aerosol
    scatter or part
    be dispersed in a volley
    type of:
    part, separate, split
    go one's own way; move apart
  3. verb
    go away or disappear
    synonyms: clear
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    type of:
    disappear, go away, vanish
    become invisible or unnoticeable
  4. verb
    spend frivolously and unwisely
    synonyms: fool, fool away, fritter, fritter away, frivol away, shoot
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    type of:
    consume, squander, ware, waste
    spend extravagantly
  5. verb
    live a life of pleasure, especially with respect to alcoholic consumption
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    type of:
    lead a certain kind of life; live in a certain style
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