dissolute (adj.)

late 14c., "loose, negligent, morally or religiously lax," from Latin dissolutus "loose, disconnected; careless; licentious," past participle of dissolvere "loosen up" (see dissolve). A figurative use in classical Latin; the etymological sense "disrupted, severed" (early 15c.) is rare in English. Related: Dissolutely; dissoluteness.