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What is the opposite of rational?

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

Adjective
Opposite of based on, or in accordance with, reason or logic
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“Overall, the moral excuses for war we have been fed are at best inconsistent, illogical and hypocritical.”
Adjective
Opposite of able to think sensibly or logically
“Ferran and Chien Chi's works in particular present ethical challenges, regarding ethical treatment of the mentally unsound.”
Adjective
Opposite of endowed with the capacity to reason
“Ideologically, they turn in on themselves, becoming more regressive and irrational in their justifications and often more cruel in their political actions.”
Adjective
Opposite of reasonable and convincing
Adjective
Opposite of characterized by sound judgment
Adjective
Opposite of very pragmatic or realistic, lacking emotion or artificiality
Adjective
Opposite of mentally calm, having no emotion too strong or too weak
“It is in those of delicate health, neurotic disposition, and psychoneurotic tendencies, that reassurances are needed.”
Adjective
Opposite of justifiable, well-maintained, or able to be defended
Adjective
Opposite of showing little or no feeling
Adjective
Opposite of having or showing experience, knowledge, and good judgment
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“It may be unwise to invest in the stock market while prices continue to drop.”
Adjective
Opposite of having or showing great perception or insight
“If you have a point, you sure have an obtuse way of explaining it!”
Adjective
Opposite of relating or devoted to the study of the fundamental nature of knowledge, reality, and existence
Adjective
Opposite of having or showing a sensible and practical idea of what can be achieved or expected
“They felt that it was an impractical exercise from an engineering standpoint and that the market for such a radio would be minuscule.”
Adjective
Opposite of appropriate or suitable in the circumstances
Adjective
Opposite of allowed or permitted according to the rules or laws
Adjective
(of a person) Opposite of having emotional or mental peace
“But that is as far as I can go in praising this decrepit and unbalanced person.”
Adjective
Opposite of involving analytical, logical or rational thought
Adjective
Opposite of having or showing a calm attitude towards disappointments or difficulties
Adjective
Opposite of profound in awareness or understanding
“Owen only ever engaged in superficial thoughts and ideas that were shaped by the mainstream.”
Adjective
Opposite of having or showing a rational, modern, and well-informed outlook
Adjective
(of a person) Opposite of sensible, reliable, and self-restrained
Adjective
Opposite of based on or behaving according to what is morally right and fair
Adjective
Opposite of of or according to the rules of logic or formal argument
“She gave me a wild and incoherent explanation about habitation on the planet Mars.”
Adjective
Opposite of capable of being trusted
“We need to have a discussion about our irresponsible colleague who is prone to acting in unpredictable ways.”
Adjective
Opposite of not having or showing a dislike or distrust based on fixed or preconceived ideas
Adjective
Opposite of relating to one's mental functions or abilities
“Malnourishment prevents a child from reaching full mental and physical development.”
Adjective
Opposite of done or performed with a conscious purpose or intent
“The funniest malapropisms and turns of phrase tend to be unintentional bloopers.”
Adjective
Opposite of to be reasonably expected
Adjective
Opposite of relating to the intellect
“We have plenty of extracurricular and nonacademic activities for children during the holidays.”
Adjective
Opposite of that may be inferred or drawn as a conclusion
Adjective
Opposite of thoughtful or reflective in one's approach
“We mostly talked about inane things, and I got the impression that he was a very superficial individual.”
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