to put it mildly

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to put it mildly

To underemphasize or downplay something. This phrase is typically used without conjugating the infinitive "to put." A: "Oh, it was just a rain storm." B: "Yeah, to put it mildly. It was more like a hurricane!"
See also: mildly, put, to
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

to put it mildly

 and put it mildly
to understate something; to say something politely. (Note the variation in the examples.) She was angry at almost everyone—to put it mildly. To say she was angry is putting it mildly. To put it mildly, she was enraged.
See also: mildly, put, to
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

put it mildly

Understate, say without exaggeration, as in It's a fairly long way to walk, to put it mildly-twenty miles or so. [First half of 1900s]
See also: mildly, put
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

put it ˈmildly

used for showing that you could have said something much stronger or more critical, etc: He was annoyed, to put it mildly (= he was very angry).‘She said you didn’t like it.’ ‘That’s putting it mildly — it’s hideous!’
See also: mildly, put
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
To put it mildly, 2009 is going to be an interesting year for the industry.
His initial impressions were overwhelmingly negative, to put it mildly. He found her writing "too cloying" and he believed Therese to be an "appalling pious little prig!"
This nearly ubiquitous connection is, to put it mildly, rather strange.
(He describes his own trajectory as "from college to professional killer, and then to benign professor") And although that was, to put it mildly, wrenching for those lucky enough to survive, there was a moral payoff: The professional killer forever after counseled the college professor.
Graham Williams, of Claude Road, whose nephew Luke Jones, seven, goes to the school, said: "To put it mildly I'm fuming.
"I look a bit strange to put it mildly but these are small prices to pay."
It must take a certain quiet courage for this seemingly mild-mannered public figure to risk the kind of vilification he could face if the disabled-rights community - which, to put it mildly, does not have a record of taking criticism gracefully - identifies him as the equivalent of a "disabled Tom Sowell."
But to anyone who has worried about the role the press plays in choosing presidents, Patterson's offerings will seem, to put it mildly, warmed-over fare of little nutritional value.
Log on to to find the name of a local therapist, who'll help you deal better with what is a deeply destructive and, to put it mildly, unacceptable habit.
Politically, getting that to happen in Japan is exceedingly difficult, to put it mildly.
"I am extremely p***d off, to put it mildly," he says.
She won't be happy, to put it mildly, but she must be told.
Larry Ellison may well sit on Zen Buddhist rocks, but he is a warrior out of the Rockefeller mold, to put it mildly.
Becky Measures has made a massive decision, to put it mildly.
I MUST admit to not being very patient and to say I've been frustrated in the last two months is to put it mildly. This summer has been a drag.
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