glitch -
A sudden, unexpected, and usually temporary malfunction of equipment such as a computer
The space shuttle take-off was canceled with 2 seconds left in the countdown, due to a glitch discovered in the fuel supply.
verb
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fumble -
Use the hands clumsily while doing or handling something
The football player fumbled the ball, so the opposing players tried to grab it.
noun
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blunder -
A stupid or careless mistake
Emma realized she had made a huge blunder when she accidentally deleted the entire spreadsheet.
noun
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liability -
Something that is likely to cause a problem.
Joe was going to choose Fred as his running mate, but then he realized that Fred's drinking problem would just make him a liability, so he chose someone else.
verb
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flub -
To fail or make a mistake
The outfielder flubbed the catch when the baseball flew past him.
verb
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bobble -
To lose one's grip (on a ball)
The wide receiver bobbled the ball and was unable to complete the play.
noun
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futility -
the quality being ineffective, useless, unsuccessful, and achieving nothing.
Elon Musk confronted the common attitude regarding the futility of going to Mars, and is proving them wrong.
verb
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bungle -
To carry out a task clumsily or incompetently, leading to failure or an unsatisfactory outcome
The painter bungled his job when he misspelled the word on the road sign.
adjective
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inadvertent -
Not deliberately planned or intended.
He made an inadvertent mistake by sending the email to the wrong person.
noun
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dud -
A thing that fails to work properly or is otherwise unsatisfactory or worthless
The firework turned out to be a dud when it landed back on the ground.
noun
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mixup -
An error resulting from things being wrongly arranged or identified.
There was a mix-up at the airport, and my luggage went to the wrong city.
verb
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fizzle -
To finish in a way that is disappointing
At the start of his race for mayor it looked like Fred was going to win, but his many verbal mistakes caused his candidacy to just fizzle out.