空 空 kōng Strokes8 Radical 穴 — cave, den, hole Made of 穴 cave, den, hole 工 labor, work How it's builtPhono-semantic — one part hints at the meaning, another at the sound Play the animation
气 气 qì Strokes4 Radical 气 — air, gas How it's builtIdeograph — the meaning is built from its parts Play the animation More about the character 气