额外 (éwài) · extra

额 é · forehead

What 额 is made of

• 客kè — guest
  • 宀 — roof
    • 丶 — dot
    • 冖mì — cover
  • 各gè — individual
    • 夂zhǐ — to go
    • 口kǒu — mouth
• 页yè — page
  • 贝bèi — sea shell
    • 冂 — frame
    • 人rén — person

外 wài · outside

What 外 is made of

• 夕xī — evening
  • 勹bāo — wrap shape
    • 丿 — falling stroke
  • 丶 — dot
• 卜bo — divination
  • 丨 — vertical stroke
  • 丶 — dot

Origin hint: Night-time 夕 divinations 卜; the supernatural, the foreign (from the Make Me a Hanzi dataset; treat as a memory aid where history is uncertain)