a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me

personal, private / secret

a personal or private matter / selfishness / privacy, secrecy / (women's speech, obsolete) a brother-in-law

Alternative spelling of 私達 (“we; us”)

private; mine

develop-and-import formula (i.e. developing resources, etc. abroad and then importing them)

undeveloped, untapped

being undeveloped

research & development; R&D