所以

therefore / as a result / so / the reason why

actually / place / classifier for houses, small buildings, institutions etc / that which / particle introducing a relative clause or passive / CL:個|个[ge4]

old variant of 以[yi3]

old variant of 以[yi3]

abbr. for Israel 以色列[Yi3 se4 lie4]

to use / by means of / according to / in order to / because of / at (a certain date or place)

(after a noun N and before a predicate P) the reason why N P / Example: 我之所以討厭他|我之所以讨厌他[wo3 zhi1 suo3 yi3 tao3 yan4 ta1] "the reason why I dislike him (is ...)"

to get carried away / to forget oneself

the reason why

to know that it is so but not why it is so (idiom)

to not know the reason / to not know what to do

see 忘乎所以[wang4 hu1 suo3 yi3]