(grammar) Particle: a part of speech in Japanese grammar known as a particle or relational; a suffix indicating the part of speech of the previous element or the mode of the whole preceding sentence or clause.

Japanese-language education for non-native speakers

impossible to understand, utterly confused

(colloquial) current boyfriend

everything

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

everyone, one and all

adverbial particle

sentence-ending particle

binding particle, linking particle