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).
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.