unnecessary

needlessness

necessary evil

everything

(colloquial) current boyfriend

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

everyone, one and all

having a comeback or excuse for everything one is told, being smart in the sense of having a smart mouth

a Japanese word of ancient Japanese origin (as opposed to a word borrowed from Chinese, or composed in Japan from Chinese-derived roots) / Japanese songs or poetry (such as tanka)

male language, men's words