放荡

licentious / wanton / morally unrestrained

to put / to place / to release / to free / to let go / to let out / to set off (fireworks)

variant of 蕩|荡[dang4]

variant of 燙|烫[tang4] / variant of 趟[tang4]

to wash / to squander / to sweep away / to move / to shake / dissolute / pond

wanton and unrestrained (idiom); dissolute