sly

• She became retenue — espiègle —in English, sly-boots. —  Artists in Crime - Ngaio Marsh - Alleyn 06: 1938
• In high school he started making beats on the sly, and cadging them away. —  The Stones Throw News Feed
• The only human beings they encountered were the Bedouin Arabs--sly, furtive fellows who were always ready for a trade, but who would kill a man just as readily for his shirt The slow progress, however, did not worry Kitchener particularly. —  Boys' Book of Famous Soldiers
• It was like the sly, mean face of a serpent disguised as a woman I remember once saying to you, Padre, when you had read aloud "The Idylls of the King" to Brian and me as children, that Vivien was the worst cad I ever heard of since the beginning of the world! —  Everyman's Land
• "You're sly--but I seen you givin' her that airin' behin' Lizette and Sadie B You've nothing to do with that," said Travis gruffly. —  The Bishop of Cottontown A Story of the Southern Cotton Mills

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