...malicioso, -a, mischievous, sly, roguish, malicious, evil-minded... 
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
... He soon began to notice all around him a silent and sly conspiracy to get possession of his money...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...But he wasknown to Bibot, and there was no fear of his turning out to be a sly Englishmanin disguise...
Baroness Orczy 「The Scarlet Pimpernel」
...He spoke of ingratitude in feeling terms; he even permitted himself another sly allusion to that little jest of his concerning the police, which he had promised never again to mention...
Rafael Sabatini 「Scaramouche」
... Columbine was the essence of pert indifference under his cajolery, saucily mocking under his threats, and finely sly in extorting the very maximum when it came to accepting a bribe...
Rafael Sabatini 「Scaramouche」
... you sly fellow!” ...
Alexandre Dumas, Pere 「Louise de la Valliere」
...Malbihn and Jenssen rose to follow him and as they did so their eyesmet, and Malbihn slowly drooped one of his lids in a sly wink...
Edgar Rice Burroughs 「The Son of Tarzan」
...Dolly broke into a mischievous sly smile...
Grant Allen 「An African Millionaire」
...That protectionwas protection in fact, not the false "protection" that shoots onthe sly...
William T. Hornaday 「Our Vanishing Wild Life」
...They are very sly birds and creep about through stonewalls and under brush like so many mice; they have a sweetsong but not as loud as that of the House Wren...
Chester A. Reed 「The Bird Book」
...I have also trapped in one or two other states, and wherever I found the fox, I found him the same sly fox...
Eldred Nathaniel Woodcock 「Fifty Years a Hunter and Trapper」
...I had a little experience with a sly old female fox last winter, says Claude Roora, of Ohio...
A. R. (Arthur Robert) Harding 「Fox Trapping」
...It takes in most of those old sly ones that have been nipped by steel traps, etc...
A. R. (Arthur Robert) Harding 「Fox Trapping」
..."Last winter, which was very mild, was a poor year for catching the sly old coyote...
A. R. (Arthur Robert) Harding 「Wolf and Coyote Trapping」
...This is an excellent method, especially for the old, sly animals...
Elmer Harry Kreps 「Science of Trapping」
...The hen is sly insecreting her nest, but usually selects a dry, well-protectedplace...
Richard L. Allen 「Domestic Animals」
...He had been bitten, on the sly, by half the ill-natured curs in the settlement, and had only shown his teeth in return...
R.M. Ballantyne 「The Dog Crusoe and his Master」
...It is you whom we want for ourprotector and lawmaker, not this sly fellow no bigger than a bean...
Abbie Farwell Brown 「The Curious Book of Birds」
... There was pop in his rubberboots a creepin' along—a c-r-e-e-p-i-n' along as sly as a mouse toward'em, and there they stayed...
Virginia Sharpe Patterson 「Dickey Downy」
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