not to speak of

not to speak of

In addition to or as well as what's been discussed. Typically used to mention an additional item when listing things that one considers negative. I've already got to spend three hours in the car running errands, not to speak of the hour and a half it will take to pick up the kids from school. They have two massive houses in the city, not to speak of their vacation home by the beach.
See also: not, of, speak, to
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in classic literature ?
But not to speak of the passage through the whole length of the Mediterranean, and another passage up the Persian Gulf and Red Sea, such a supposition would involve the complete circumnavigation of all Africa in three days, not to speak of the Tigris waters, near the site of Nineveh, being too shallow for any whale to swim in.
Indeed, a love for any one of these significant writers will be enough, not to speak of an admiration for "Aucassin and Nicolete."
For a long time she did not know that she had ever had any brothers; for her father and mother took care not to speak of them before her: but one day by chance she heard the people about her speak of them.
But not to speak of her alone, that early and terrible death has had the most beneficent influence on me and on my brother in spite of all our grief.
They added that the consumption of these dairy products was causing numerous diseases, adding that there was no check on the sale of these products not to speak of action by the authorities.
Aman Ullah Chattha said that the rate of urea fertilizer had increased from Rs.1760 per bag to Rs2000 which was beyond the reach of even big landlords, not to speak of small growers.
THE pounds 1.6 million cost of supplying wind generated electricity to the island of Eigg underlines the appalling cost of this form of power, that in this case works out at about pounds 100,000 per family, not to speak of the continuing subsidies this installation will receive out of our pockets.
Few artists have been given the possibility--and fewer still have found the strength and means--to court closure so deliberatively and fearlessly in their practices, not to speak of their lives.
Try telling that to the Iraqis who have lost their families, homes, hospitals and schools, not to speak of utilities such as power and water.
In contrast to the space accorded the first two Gospels, Luke and John endure relatively short shrift, with the result that problems of continuity and discontinuity, not to speak of attitudes, in these last two Gospels are obscured by overly facile treatment.
In this essay we shall limit the definition of science to the mathematical and natural, while remembering that Ibn Sina also made major contributions to the sciences of language, music, psychology, etc., and even the occult sciences (al-'ulum al-gharibah), not to speak of the supreme science or metaphysics (al-ilahiyyat) which determined the framework for his understanding of natural philosophy (al-ilahiyyat).
It is probably asking too much of anyone to immediately forgive, not to speak of forgetting.
Here is a small and rather poor country making an exquisite, imaginative, economical thing, and showing up the stupidity of the blundering bureaucratic taste of big rich nations like the Germans and French (not to speak of the appalling market mediocrity of the British).
But such a climate can too easily lead down a slippery slope to inefficiency and skewed incentives, not to speak of damage to America's political fiber through a weakening of the nation's democratic spirit.