贅沢
ぜいたく · zeitaku · JLPT N3 · noun
luxury
💎🥂 贅沢 = excess + abundance: too much of plenty
贅 means surplus or superfluous, as in 贅肉 (zeiniku, excess flab). 沢 means abundant, as in 沢山 (takusan, lots). Pile surplus on top of abundance and you get luxury.