(dated) Short for ブエノスアイレス州 (Buenosu Airesu-shū, “Buenos Aires (a province of Argentina)”).

(formal) friend

The katakana syllable ブ (bu). Its equivalent in hiragana is ぶ (bu).

first-level administrative division of some countries, such as: (1) state of the United States, Australia, India, Nigeria and Germany; (2) province of Canada; (3) canton of Switzerland; etc.

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

to come (toward the speaker/writer) / (specifically, of a sensation) to come and stimulate / (と来たら (to kitara)) when it comes to

next..., coming...

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

a personal or private matter / (by extension) selfishness

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