至高无上

• 一(one; hit target)ASSOCIATIVE
• 厶(small curved object; arrowhead tail)ASSOCIATIVE
• 土(earth; ground; destination)ASSOCIATIVE

An arrow flying downward and piercing into the earth represents arrival at a destination.

• 高(tall; high; tower; tall building)ASSOCIATIVE

A tall tower reaching high is drawn with a roof, gate, and stacked foundation layers piled on top of each other.

• 一(one; initial)ASSOCIATIVE
• 尢(disabled person; insufficient)ASSOCIATIVE

From the beginning there was a shortage, so 無 means 'nothing at all'.

• ⺊(dot above; high position)ASSOCIATIVE
• 一(standard baseline; norm)ASSOCIATIVE

A dot mark sitting above a horizontal line represents the meaning 'above'.