His ploy to discredit his girlfriend's story backfired on him.
Dis-
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Dis means not or opposite of. Some other examples are dismiss and disrespect.
I will provide 11 words to get you started: disabilitydisappeardisagreedisasterdiscarddischargedisciplediscoverdiscreetdisfiguredishonest
I discredit my friend from the spelling bee contest and I am ashamed
His ploy to discredit his girlfriend's story backfired on him.
The news article aimed to discredit the false claims made by the politician.
The candidate tried to discredit his opponent.
Yes. example : The evidence would tend to discredit such a theory.
Discredit : to invalidate, or to cast doubt on a person's work Example : "The new find seemed to discredit earlier theories about atomic particles." Example : "The revelation that he was paid by tobacco companies was designed to discredit the scientist and his clinical studies."
Each presidential candidate tried to discredit the other candidate.
A fellow employee of mine tried to discredit me with my boss. I posted a e-mail from my x-wife trying to discredit her claim that she had never had an affair.
Your lawsuit will discredit the claims made by that clinic, their methods have no scientific basis.
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I lie about his past to discredit him. He was shot in the leg by a rookie (example of someone being discredited)