Synonyms of 'errant'
His errant son ran up debts of over £3000.
the days of King Arthur's knights errant
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His rages and aberrant behaviour worsened.
Deviant behaviour or thinking is different from what people normally consider to be acceptable.
social reactions to deviant and criminal behaviour
Thesaurus for errant from the Collins English Thesaurus
Errant is used to describe someone whose actions are considered unacceptable or wrong by other people. For example , an errant husband is unfaithful to his partner .