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unreasonable behaviour

British  

noun

  1. law conduct by a spouse sufficient to cause the irretrievable breakdown of a marriage

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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A number of other allegations relating to unreasonable behaviour by Mr Byrne and pressure to work excessive hours were not upheld, the report found.

From BBC Apr. 28, 2022

People will no longer have to cite adultery, unreasonable behaviour or desertion as a reason - just that the marriage has broken down irretrievably.

From BBC Aug. 19, 2021

Currently in order to start divorce proceedings immediately, one spouse has to allege adultery, unreasonable behaviour or desertion has taken place.

From BBC Jun. 8, 2020

Many of these can explain bizarre or unreasonable behaviour in people, so there’s plenty of options that should be considered before you start claiming a clinical diagnosis.

From The Guardian May 10, 2017

This unreasonable behaviour of the weather, however, could displease no one else in Hayslope besides Mr. Craig.

From Adam Bede by Eliot, George

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