名詞 hedonism:

1. the pursuit of pleasure as a matter of ethical principle
2. an ethical system that evaluates the pursuit of pleasure as the highest good

he.don.ism

n.（名詞）
Pursuit of or devotion to pleasure, especially to the pleasures of the senses.
享樂(lè)：對(duì)快樂(lè)，尤其是感官快感的追求和熱愛(ài)
Philosophy The ethical doctrine holding that only what is pleasant or has pleasant consequences is intrinsically good.
【哲學(xué)】 快樂(lè)論：認(rèn)為只有令人快樂(lè)或帶來(lái)快樂(lè)結(jié)果的東西才是在本質(zhì)上好的倫理信條
Psychology The doctrine holding that behavior is motivated by the desire for pleasure and the avoidance of pain.
【心理學(xué)】 享樂(lè)主義：認(rèn)為行動(dòng)是追求享樂(lè)逃避痛苦為動(dòng)機(jī)的信條

來(lái)源：
Greek hôdonô [pleasure] * see sw3d-
希臘語(yǔ) hôdonô [快樂(lè)] *參見(jiàn) sw3d-
-ism
-ism

【引伸】
he.donist
n.（名詞）
he.donis.tic
adj.（形容詞）
he.donis.tically
adv.（副詞）