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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Adjective
Opposite of endowed with the capacity to reason
Adjective
(attributive to a person) Opposite of based on sound reasoning or information
“She was completely unreliable with looking after the children, as you can tell from their disheveled state.”
Adjective
(of a person) Opposite of free from emotional or mental agitation
“But that is as far as I can go in praising this decrepit and unbalanced person.”
Adjective
Opposite of relating to the mind
Adjective
Opposite of able to be argued or asserted
Adjective
Opposite of relating or devoted to the study of the fundamental nature of knowledge, reality, and existence
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 showing little or no feeling
Adjective
Opposite of having or showing a calm attitude towards disappointments or difficulties
Adjective
Opposite of serious, sensible, and solemn
Adjective
Opposite of to be expected; natural, reasonable, or forgivable
Adjective
Opposite of balanced, faithful in mind
Adjective
Opposite of guided by practical experience and observation rather than by theory
Adjective
Opposite of open-minded
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 marked by justice, honesty, and freedom from bias
Adjective
Opposite of made, given, or done with full awareness of what one is doing
Adjective
Opposite of relating to the intellect
Adjective
Opposite of sane, clear thinking
Adjective
Opposite of able to be explained
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