弯曲空间

• 亦(also; too)PHONETIC
• 弓(bow; arc)RADICAL

A bent bow with a taut string pulled back like a person's body drawing an arrow.

• 曰(mouth open; speak)RADICAL
• 丨丨(two vertical strokes indicating a curve)ASSOCIATIVE

The character 曲 shows a vessel's mouth with two curved walls, evoking the image of a bent and winding elbow.

• 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.