add emphasis to the verb, violently, strongly, quickly, suddenly, (e.g. 打(ぶ)ち込(こ)む (buchikomu), ぶっ殺(ころ)す (bukkorosu), ぶん殴(なぐ)る (bunnaguru))

Alternative form of 打ち

a surname

having no effect

nailhead, head of a nail

(religion) nail that was used to crucify Jesus Christ

(idiomatic, figuratively) to give a warning, to remind a person of

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)