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English definition of “be no/without rhyme or reason”

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be no/without rhyme or reason

to be without any obvious reasonable explanation: Government money was given out to some people and not to others, apparently without rhyme or reason. There is no rhyme or reason to her behaviour.
Translations of “be no/without rhyme or reason”
in Chinese (Traditional) 毫無道理, 莫名其妙…
in Chinese (Simplified) 毫无道理, 莫名其妙…
(Definition of be no/without rhyme or reason from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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