太

plump, thick, big around

Kun

ふとい · ふとるfutoi · futorue.g.太いふといthick (round things)

On

タイ · タtai · tae.g.太鼓たいこdrum

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

大big

Parts

大big丶drop