名詞 euphemism:

1. an inoffensive expression that is substituted for one that is considered offensive

1. "Pass away" is a euphemism for "die".
   "過(guò)世"是"死"的委婉語(yǔ)。
2. `Pass away' is a euphemism for `die'.
   ｀去世＇是｀死＇的委婉說(shuō)法。
3. `Pass water' is a euphemism for `urinate'.
   ｀小便＇是｀排尿＇的委婉語(yǔ)。

eu.phe.mism

n.（名詞）
The act or an example of substituting a mild, indirect, or vague term for one considered harsh, blunt, or offensive:
委婉，委婉的說(shuō)法：用一個(gè)適度的、不直接的、含糊的詞來(lái)取代一個(gè)令人感到粗魯?shù)?、過(guò)于率直、具有冒犯性的詞：
例句：
.Euphemisms such as ‘slumber room’ . . . abound in the funeral business.(Jessica Mitford)
.委婉語(yǔ)‘睡眠的房間’，在葬禮業(yè)常用.(杰西卡·米特福德)

來(lái)源：
Greek euphômismos
希臘語(yǔ) euphômismos
from euphômizein [to use auspicious words]
源自 euphômizein [用吉祥的詞]
from euphômia [use of auspicious words]
源自 euphômia [吉祥詞的使用]
eu- [eu-]
eu- [好]
phômô [speech] * see bh3- 2
phômô [說(shuō)話] *參見(jiàn) bh3- 2

【引伸】
eu.phemist
n.（名詞）
eu.phemis.tic
eu.phemis.tically
adv.（副詞）