Clipping of ソビエト連邦 (Sobieto Renpō, “Soviet Union (a former country)”).

to be born / to come into existence

a grandfather

age, era, period (of time) / the times, spirit of the age / antiquity / a time in one's life, one's days (in college etc.)

(chiefly women's speech) first person singular pronoun: I, me

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

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