slyly

adv

Etymology: From Middle English sleighly; equivalent to sly + -ly.

1. In a sly manner, cunningly.

   “VVhen ſhe vvas dreſt, therefore, dovvn ſhe vvent, reſolved to encounter all the Horrours of the Day, and a moſt diſagreeable one it proved; for Lady Bellaſton took every opportunity very civilly and slily to inſult her; […]”

   “So when they were working that evening at the pumps, there was on this head no small gamesomeness slily going on among them, as they stood with their feet continually overflowed by the rippling clear water; […]”