- In a way intended to escape notice:
took extra payments on the sly.
- secretly; stealthily
Other Word Forms of Sly
Idioms, Phrasal Verbs Related to Sly
Origin of Sly
From Middle English sly, sley, from Old Norse slÇ£gr, slÅ“gr (“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"), German schlau (“clever, crafty"). Related to sleight, slay.
Middle English sleigh from Old Norse slœgr
From American Heritage Dictionary of the English Language, 5th Edition
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