一逞獸欲

to give way to one's beastly lust

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

to show off / to flaunt / to carry out or succeed in a scheme / to indulge / to give free rein to

beast / animal / beastly / bestial

desire / appetite / passion / lust / greed

to wish for / to desire / variant of 慾|欲[yu4]