Taivo A Taiwan Mandarin dictionary

鑽牛角尖

zuānniújiǎojiān

ㄗㄨㄢ ㄋㄧㄡˊ ㄐㄧㄠˇ ㄐㄧㄢ

Simplified 钻牛角尖

  1. 1lit. to penetrate into a bull's horn (idiom); fig. to waste time on an insoluble or insignificant problem
  2. 2to bash one's head against a brick wall
  3. 3a wild goose chase
  4. 4a blind alley
  5. 5to split hairs

Keep 鑽牛角尖 and it comes back until you know it.

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