Surreptitiously

The cat surreptitiously crept up to the bird feeder, trying to catch a bird.

The burglar surreptitiously entered the house through the back door.

The employee surreptitiously took confidential documents from the company's database.

He surreptitiously eavesdropped on their conversation.

The child surreptitiously snuck a cookie from the cookie jar.

The politician surreptitiously made a deal with a foreign government.

He surreptitiously turned off the lights to surprise his wife.

The thief surreptitiously pocketed the jewelry and slipped out of the store.