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OneKitly

sly

adjectiveadverbcommon in dialogue

  • //slaɪ//

Artfully cunning; secretly mischievous; wily.

adjective

  1. 1

    Artfully cunning; secretly mischievous; wily.

  2. 2

    Dexterous in performing an action, so as to escape notice

  3. 3

    Done with, and marked by, artful and dexterous secrecy; subtle

    a sly trick

  4. 4

    Light or delicate; slight; thin.

Etymology

From Middle English sly, sley, sleigh, sleiȝ, from Old Norse slǿgr (“sly, cunning”, literally “capable of hitting or striking”), from Proto-Germanic *slōgiz (“lively, agile, cunning, sly, striking”), from Proto-Indo-European *slak- (“to hit, throw”). Cognate with Icelandic slægur (“crafty, sly”), Norwegian Nynorsk sløg (“sly”). Related to sleight, slay. In all likelihood, however, unrelated with Saterland Frisian slau (“sly, crafty”), Dutch sluw (“sly, cunning”), Low German slu (“sly, cunning”), German schlau (“clever, crafty”). Doublet of sleight and slöjd

adverb

  1. 1

    Slyly.

Forms

comparative
slier, slyer
superlative
sliest, slyest
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).