use one thing for many purposes / work someone hard

to use one's head

Kyūjitai form of 破壊 (destruction; demolition)

Kyūjitai form of 壊疽

Kyūjitai form of 崩壊

(education) The 1,026 kanji taught in primary school; a subset of 常用漢字 (じょうようかんじ, jōyō kanji)

smaller kanji historically used as a pronunciation guide, similar to modern furigana

kanji approved for regular use by the 文部科学省 (Monbu-kagaku-shō, “Japanese Ministry of Education”)

Sino-Korean vocabulary or "Hanja-eo"

The iteration mark 々, which indicates that the previous kanji ought to be repeated.