Etymology
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luxuriate (v.)
1620s, "grow exuberantly or in abundance," also "indulge in luxury," from Latin luxuriatus, past participle of luxuriare "have to excess," figuratively "run riot, be dissolute, indulge to excess," from luxuria "excess, rankness, luxuriance" (see luxury). Related: Luxuriated; luxuriating.
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luxuriant (adj.)

"exuberant in growth or quantity," 1530s, from French luxuriant and directly from Latin luxuriantem (nominative luxurians), present participle of luxuriare "have to excess, grow profusely" (see luxuriate). Related: Luxuriantly.

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