Taivo A Taiwan Mandarin dictionary

撓頭

náotóu

ㄋㄠˊ ㄊㄡˊ

Simplified 挠头

  1. 1tricky
  2. 2problematic
  3. 3difficult
  4. 4to scratch one's head (in puzzlement)

Keep 撓頭 and it comes back until you know it.

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