切空间

• 七(seven)PHONETIC
• 刀(knife; blade)RADICAL

Using a knife to chop seven times cuts everything apart.

• 穴(row; gap)RADICAL
• 工(craftsman; work)PHONETIC

An empty cave with nothing inside is just hollow space.

• 門(door; leaf)RADICAL
• 日(sun; light)ASSOCIATIVE

A beam of sunlight shining through a crack in the door creates the empty space in between.