Etymology

incautious

I1N1C3A1U1T1I1O1U1S1

Today it means: careless, reckless, not exercising proper caution. Full definition →

English cautious ← Middle English in- ← Latin in-
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Italic*n̥-
  4. Latinin-
  5. Middle Englishin-
  6. Englishin-
  7. Englishcautious
  8. English todayincautious

From in- (negative prefix) + cautious.

Etymology from Wiktionary, CC BY-SA 4.0.