to say nothing of something
to say nothing of (someone or something)
Not even considering or mentioning the significance or impact of someone or something else; not to mention (someone or something). It will take me at least two hours to fix this part of the fence, to say nothing of repairing all of it. Their newborn will be difficult enough to take care of while they're away, to say nothing of their temperamental toddler.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
to say ˈnothing of somethingand also; not forgetting: She is an expert in Chinese, to say nothing of speaking several European languages.
Farlex Partner Idioms Dictionary © Farlex 2017