极端主义

• 木(tree; wood)RADICAL
• 及(reach; attain; catch up)PHONO-SEMANTIC

An extreme point is the uttermost end of a wooden pole, where a hand just barely reaches.

• 立(stand upright; erect)RADICAL
• 耑(sprout; bud)PHONETIC

Standing upright and straight from beginning to end is the meaning of the character 端.

• 丶(dot; flame; jewel on peak)RADICAL
• 王(king)ASSOCIATIVE

A ruler wearing a jade crown on his head is the supreme master.