plural marker / attached to the name of the representative of a group to refer to that whole group / (archaic, possibly obsolete) honorific suffix

impossible to understand, utterly confused

(derogatory) scholasticism

Synonym of 倫理学 (rinrigaku, “ethics”); moral philosophy

philosophical

positivism

philosopher

(colloquial) current boyfriend

everything

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