11 letters · 14 points in Scrabble
noun breaking up and scattering by dispersion
noun dissolute indulgence in sensual pleasure
noun useless or profitless activity; using or expending or consuming thoughtlessly or carelessly
originFrom Middle English dissipacion, dissipacioun, from Late Latin dissipātiō. Morphologically dissipate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0