not to mention
phrase
as in let alone
to say nothing of
The airfare is pricey, not to mention the cost of food and lodging.
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“Not to mention.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/not%20to%20mention. Accessed 1 Dec. 2025.
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