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wily

American  
[wahy-lee] / ˈwaɪ li /

adjective

wilier, wiliest
  1. full of, marked by, or proceeding from wiles; crafty; cunning.

    Synonyms:
    treacherous, deceitful, foxy, tricky, designing, sly, artful
    Antonyms:
    open, straightforward

wily British  
/ ˈwaɪlɪ /

adjective

  1. characterized by or proceeding from wiles; sly or crafty

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of wily

Middle English word dating back to 1250–1300; see origin at wile, -y 1

Explanation

Did you fall for that wily door-to-door salesman's pitch? He must be very slick and tricky to have convinced you to buy a set of new tires, considering you don't have a car. How can you remember the meaning of the adjective wily? Just think about the old Warner Brothers Looney Tunes cartoons. Their aptly named cartoon character, Wile E. Coyote, got his name from a clever play on words. Wile E. is supposed to be cunning, crafty, and clever — in other words, wily. Wile E. is all those things, but unfortunately he was usually bested by that pesky roadrunner anyway. Meep. Meep.

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Vocabulary lists containing wily

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It didn’t achieve much, but it also didn’t appear to give away anything notable to the wily dictator.

From The Wall Street Journal • May 15, 2026

Here Hyungjin Son, the bumpkin-ish Bardolph in “Falstaff,” portrayed the Count, while Colclough was the wily Figaro.

From Los Angeles Times • Apr. 29, 2026

Lyndon B. Johnson, the party’s wily leader, used it to effectively kill business-friendly amendments to a federal labor law that the GOP had been pushing.

From Slate • Apr. 24, 2026

John Rudge was at Stoke with me, as our director of sport, and was a wily old fox.

From BBC • Feb. 2, 2026

Hunters will tell you that a moose is a wily and ferocious forest creature.

From "A Walk in the Woods" by Bill Bryson

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