塞

close, shut, cover, block, obstruct

Kun

ふさぐ · とりで · みちるfusagu · toride · michiru

On

ソク · サイsoku · sai

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

土earth

Parts

土earth一oneハeightform of 八宀roof