blunder

Meanings

1. 1
   noun

   a careless mistake; (verb) to make such a mistake or move clumsily

   His one blunder cost the team the entire match.

Simplified etymology

Blunder is a Middle English word that originally meant “to move blindly or flounder” and is probably related to blind. Its association with clumsiness extended near the end of the 15th century to thoughtless or clumsy speech. The modern sense developed in the early 18th century.

From Middle English blunderen ('to stumble, move blindly'), probably from a Scandinavian source related to Old Norse blunda ('to shut the eyes, doze'), suggesting acting blindly.

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