noun
blunder
BLUHN-duh
noun
1
A careless or embarrassing mistake.
"Forgetting the client's name was an unforgivable blunder."
"The goalkeeper's blunder cost the team the match."
verb
1
To make a careless, serious mistake.
"The company blundered by launching the product without testing it first."
How to Use Blunder
Learner’s notesIn plain EnglishA stupid, avoidable mistake, or the act of making one.
Common pairings
a costly blunder
blunder into
major blunder
Word Forms
blundered past tense, blunders plural, blunders singular
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Etymology
From Middle English blunderen, ultimately related to Old Norse blunda ("to doze"), suggesting a mistake made through carelessness or inattention.