Etymology

nutso

N1U1T1S1O1

Today it means: Crazy, insane. Full definition →

English oh ← Middle English o ← Old French oh
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The story

  1. Englishnuts
  2. Latinō
  3. Old Frenchoh
  4. Middle Englisho
  5. EnglishO
  6. Middle Englisho
  7. Englishoh
  8. English todaynutso

From nuts + -o.

Etymology from Wiktionary, CC BY-SA 4.0.