What is the opposite of well-founded?

Need antonyms for well-founded? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of based on, or displaying, common sense
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Adjective
Opposite of unable to be disputed or questioned
Adjective
Opposite of reasonable and convincing
Adjective
Opposite of done with full awareness of the likely consequences
“The decision to purchase a new car was both rash and thoughtless.”
Adjective
Opposite of of, characterized by, or consisting of (incontrovertible) facts
“The proposal submitted to the board was not accepted with a number of questionable recommendations to be interrogated.”
Adjective
Opposite of based on fact
“As it turns out, the information you provided was largely fictitious and of no use to us.”
Adjective
Opposite of genuine, real or authentic
“The organizers strayed from traditional cooking methods, using artificial ingredients to prepare the dishes.”
Adjective
Opposite of capable or deserving to be admitted, accepted or allowed
Adjective
Opposite of capable of withstanding great physical force
“The house was built on fragile foundations.”
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