確

assurance, firm, tight, hard, solid, confirm, clear, evident

Kun

たしか · たしかめるtashika · tashikameru

On

カク · コウkaku · kou

Kun is the Japanese reading, used when the kanji stands alone with kana after it. On comes from Chinese and is mostly used in compound words.

Radical

石stone

Parts

石stone口mouth宀roof隹short-tailed bird