平方根

• 干(trunk; stem (horizontal representation))ASSOCIATIVE
• 丷(two diverging strokes; balance)ASSOCIATIVE

An upright tree trunk with two branches spreading equally on both sides symbolizes flatness and fairness.

• 方(direction; perpendicular (pictograph—plow or boat with oar))ASSOCIATIVE

A plow or oar shape represents the concept of direction or region.

• 木(tree; wood)RADICAL
• 艮(firm; stop)PHONETIC

A tree's root is the hard, solid wood that lies deep underground and never moves.