English Thesaurus

Synonyms of 'unreasonable'

(adjective) 
Definition
refusing to listen to reason
The strikers were being unreasonable in their demands.
Synonyms
,
arbitrary
Arbitrary arrests were common.
,
irrational
an irrational fear of science
,
illogical
his completely illogical arguments
,
blinkered
They've got a very blinkered view of life.
,
opinionated
He's an opinionated man who always thinks he knows best.
,
Opposites
(adjective) 
Definition
unfair and excessive
unreasonable increases in the price of petrol
Synonyms
excessive
banks which cripple their customers with excessive charges
,
steep (informal)
The annual premium can be a little steep.
,
exorbitant
exorbitant housing prices
, ,
absurd
They go to absurd lengths just to avoid paying a few pounds.
,
extravagant
He was extravagant in his admiration of Lillie.
,
unjust
campaigning against racist and unjust immigration laws
,
too great
,
undue
It might give them undue influence over the coming negotiations.
,
preposterous
The whole idea was preposterous.
,
unwarranted
an unwarranted interference in the country's internal affairs
, ,
extortionate
the extortionate price of designer clothes
,
uncalled-for
Leo's uncalled-for remarks about her cousin
,
immoderate
He launched an immoderate tirade on his son.
Opposites

Additional synonyms

in the sense of absurd
Definition
obviously senseless or illogical
They go to absurd lengths just to avoid paying a few pounds.
in the sense of arbitrary
Definition
not done according to any plan or for any particular reason
Arbitrary arrests were common.
in the sense of blinkered
Definition
considering only a narrow point of view
They've got a very blinkered view of life.

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Video: pronunciation of 'unreasonable'

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Thesaurus for unreasonable from the Collins English Thesaurus
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The desire to push the boundaries has been a motivator in many a daring expedition, testing the human spirit and physical abilities to the utmost. Indulge your adventurous spirit by exploring some associated ‘extreme’ vocabulary. Will you have the survival skills to master our quiz?
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Whether you're in search of a crossword puzzle, a detailed guide to tying knots, or tips on writing the perfect college essay, Harper Reference has you covered for all your study needs.
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