Meanings
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1
adj
Done with, and marked by, artful and dexterous secrecy; subtle
A sly trick.
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2
adj
marked by skill in deception
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3
adj
Artfully cunning; secretly mischievous; wily.
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4
adj
Dexterous in performing an action, so as to escape notice
Thesaurus
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