Synonyms of 'regardless'
in spite of everything
Despite her recent surgery she has been carrying on regardless.
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You use anyway or anyhow to indicate that a statement explains or supports a previous point.
She won't let him stay with her, and anyway he wouldn't.
If you accuse someone of being indifferent to something, you mean that they have a complete lack of interest in it.
People have become indifferent to the suffering of others.
Thesaurus for regardless from the Collins English Thesaurus
If you say that someone did something regardless , you mean that they did it even though there were problems or factors that could have stopped them, or perhaps should have stopped them.