共

together, both, neither, all, and, alike, with

Kun

とも · ともに · -どもtomo · tomoni · domo

On

キョウkyou

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

八eight

Parts

ハeightform of 八一one二two