有空儿 (yǒukòngr) · to be free

有 yǒu · to have

What 有 is made of

• 月yuè — moon; month
  • 冂 — frame
    • 丨 — vertical stroke
  • 二 — two strokes
    • 一 — horizontal stroke
    • 一 — horizontal stroke

空 kōng · empty

What 空 is made of

• 穴xué — cave
  • 宀 — roof
    • 丶 — dot
    • 冖mì — cover
  • 八bā — eight
• 工gōng — labor
  • 一 — horizontal stroke
  • 丄shàng — above
    • 丨 — vertical stroke
    • 一 — horizontal stroke

Origin hint: 穴 gives the meaning, 工 gives the sound. (from the Make Me a Hanzi dataset; treat as a memory aid where history is uncertain)

儿 ér · child

What 儿 is made of

• 丿 — falling stroke
• 乚 — hook stroke

Origin hint: Simplified form of 兒, a picture of a child; compare 人 (from the Make Me a Hanzi dataset; treat as a memory aid where history is uncertain)