滑

slippery, slide, slip, fail exam

Kun

すべる · なめらかsuberu · nameraka

On

カツ · コツkatsu · kotsu

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

水water

Parts

氵waterform of 水月moon骨bone冂down box冖crown