忘其所以

see 忘乎所以[wang4 hu1 suo3 yi3]

to forget / to overlook / to neglect

his / her / its / their / that / such / it (refers to sth preceding it)

its place / one's appointed place / the place for that

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

therefore / as a result / so / the reason why

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)