石 石 shí Strokes5 Radical 石 — stone, rock, mineral Made of 厂 cliff 口 mouth How it's builtIdeograph — the meaning is built from its parts Play the animation More about the character 石
油 油 yóu Strokes8 Radical 氵 — water Made of 氵 water 由 cause, reason How it's builtPhono-semantic — one part hints at the meaning, another at the sound Play the animation