悲

grieve, sad, deplore, regret

Kun

かなしい · かなしむkanashii · kanashimue.g.悲しいかなしいsad

On

ヒhi

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

心heart

Parts

心heart非wrong