(female students slang) Clipping of ステーショナリー (sutēshonarī, “stationery”).

every day; daily

everyday life; daily life

drink

coffee

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

private; mine

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

a personal or private matter / (by extension) selfishness

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