Chinese

Adverb

所以

1. therefore; so; consequently

   明天要考試了，所以我今天只能留在家裡複習功課。 [MSC, trad.]

   明天要考试了，所以我今天只能留在家里复习功课。 [MSC, simp.]

   Míngtiān yào kǎoshì le, suǒyǐ wǒ jīntiān zhǐ néng liú zài jiālǐ fúxí gōngkè. [Pinyin]

   I have a test tomorrow, therefore I have to stay at home today and review my homework.

Conjunction

所以

1. Used in the first part of a sentence to indicate a reason that will be explained in the second part of the sentence.

   我所以要反對這個計畫，是因為我覺得其中有不少疏漏。 [MSC, trad.]

   我所以要反对这个计画，是因为我觉得其中有不少疏漏。 [MSC, simp.]

   Wǒ suǒyǐ yào fǎnduì zhège jìhuà, shì yīnwèi wǒ juéde qízhōng yǒu bùshào shūlòu. [Pinyin]

   My reason for opposing this plan, is because I feel that there are quite a few holes in it.

Japanese

Etymology

ゆえになり ‎(yue ni nari) > ゆえんなり ‎(yue n nari) > ゆえん ‎(yue-n). See 故 ‎(yue). The kanji are jukujikun (熟字訓).

Noun

所以 ‎(hiragana ゆえん, romaji yuen)

1. reason, grounds