sneakishly

adv

Etymology: From sneakish + -ly.

1. In a sneakish manner.

   “[…] when men come together to profess a creed, they come courageously, though it is to hide in catacombs and caves. But when they come together in a clique they come sneakishly, eschewing all change or disagreement, though it is to dine to a brass band in a big London hotel.”