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adj. shad·i·er, shad·i·est
1. Full of shade; shaded: found a cool, shady spot under some trees. See Synonyms at dark.
2. Casting shade: a large, shady elm.
3. Of dubious character, morality, or legality; questionable: "men who could indulge in any shady deal in downtown offices and still pose as beneficent angels ... on the golf course" (Louis Auchincloss).

shad′i·ly adv.
shad′i·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Last week, Ocasio-Cortez denied wrongdoing using her Twitter, ( posting on the website, "No, I don't shadily pay my boyfriend.