melt, be charmed, captivated
蕩 centers on a state of being softened or emotionally moved: melting, being charmed, or captivated. The idea is of something solid or resistant dissolving into a more fluid, yielding state.
蕩 combines 艹 (grass) with 湯 (hot water), suggesting the softening or melting effect of hot water on plants. The exact historical development is uncertain, but the component combination plausibly conveys the idea of dissolving or being emotionally moved.
Grass 艹 placed in hot water 湯 wilts and melts. Imagine a person's resistance melting away in a hot bath, leaving them charmed and captivated.
For トウ, picture a toe dipping into hot water and melting with relaxation: toe -> トウ, and the warmth captivates you.
dissipation; prodigality; debauchery
debauchery; dissipation; lewdness; lasciviousness
to sway to and fro; to drift about; to flutter; to flicker
shaking; swaying
to sway to and fro; to drift about; to flutter; to flicker
being absorbed in self-indulgent pleasures; giving oneself up to debauchery and dissipation
debauchee; profligate; fast liver; philanderer
good-for-nothing son; profligate son
being dissolute and unruly; ruining oneself by leading a fast life
fast living; dissipated life; riotous life
debauchee; fast liver; libertine; hell-raiser
warm and genial spring weather; genial and balmy
vast; wide; spacious; extensive
vast; calm
to melt (steel, etc.); to liquefy; to soften
libertine
squandering; dissipation
self-indulgent pleasure
being absorbed in self-indulgent pleasures; giving oneself up to debauchery and dissipation
debauched person