flunk -
To fail to reach the required standard in an examination, test, or course of study
Ron hid his school test from his mother because he didn't want her to know he had flunked it.
verb
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blurt -
To say (something) suddenly and without careful consideration
Xavier felt embarrassed when he blurted out the answer before hearing the whole question.
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.
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.
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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slip -
A small mistake or accident, often due to carelessness.
After he commented about her weight, he apologized for the slip of the tongue that he wished he hadn't said,
noun
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stumble -
An act of stumbling
Shane took a stumble when he tripped over a large rock on the sidewalk.
noun
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gaffe -
An unintentional act or remark causing embarrassment to its originator; a blunder
When the politician made a huge gaffe at the debate, he realized he was going to lose the election.
adjective
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humbling -
Causing someone to feel less important or proud, often by emphasizing their limitations.
Receiving so much help from strangers during hard times was a humbling experience.
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.
verb
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scuttle -
To be forced to cancel one's plans
Because he couldn't give up his smoking habit, Barry had to scuttle his plans to be a great runner.
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.