as in not to mention
to say nothing of
I never suggested that he was incompetent, still less that he was dishonest
Synonyms & Similar Words
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Example Sentences
Recent Examples of Synonyms for still less
let alone
Conjunction
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Serious damage – let alone an explosion – almost certainly didn’t happen during the course of the war, oil industry analysts agree.
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For months, critics said this was just corporate talk and that a committee of rival car companies could never agree on anything, let alone complicated computer code.
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“Still less.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/still%20less. Accessed 27 Jun. 2026.
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