surreptitious

Penelope puzzled over these mysteries daily, and had even paid a surreptitious visit or two to the attic while the children were otherwise engaged.

With the camera on the dashboard, the vehicle becomes a surreptitious mobile set with Panahi and his co-stars mostly improvising their dialogue, some of it as cutting as anything intentional.

Others find decoys to place in their pouches, pocketing their real devices for surreptitious use throughout the school day.

A sheriff’s jail supervisor testified that Baker also tried to leave coded kites — a surreptitious method of inmate communication using handwritten binary code on paper — in a courthouse stairwell that the widow used after him.

After the couple found out about her surreptitious sterilization, “All our plans came tumbling down.”