adjective, sneak·i·er, sneak·i·est.
Related formssneak·i·ly, adverbsneak·i·ness, nounun·sneak·y, adjective
Examples from the Web for sneakily
The pantheon of Sediuk pranks ranges from sneakily clever to blatantly rude.An Analysis of Vitalii Sediuk’s Pranks (He’s the Guy Who Touched Brad Pitt)|Amy Zimmerman|May 29, 2014|DAILY BEAST
Stallworth got his revenge, sneakily getting a photo taken of him with his harms around Duke.
Having pulled the excited mare into control and dismounted, I looked round, sneakily sideways, for Monty.Tell England|Ernest Raymond