Synonyms of 'notorious'
infamousDictionary, disreputable, opprobrious
one of Britain's most notorious serial killers
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Someone who is dishonourable is not honest and does things which you consider to be morally unacceptable.
He insisted he had done nothing dishonourable.
If you say that someone or something is disreputable, you are critical of them because they are not respectable or cannot be trusted.
the noisiest and most disreputable bars
Infamous people or things are well-known because of something bad.
He was infamous for his anti-feminist attitudes.
Thesaurus for notorious from the Collins English Thesaurus
To be notorious means to be well-known for something bad.