Scattered or dispersed; or describing someone who has wasted their time and energy on indulgence and pleasure-seeking.
From Latin 'dissipatus' (scattered abroad), past participle of 'dissipare' (to scatter), combining 'dis-' (apart) and 'sipare' (to throw or scatter). The meaning evolved from physical scattering to moral or energy scattering.
The word 'dissipated' is fascinating because it describes both a physical action (smoke dissipating into air) and a moral judgment (a dissipated person), showing how English takes concrete physical ideas and applies them to human behavior and character.
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