adv.in a surreptitious manner

"he was watching her surreptitiously as she waited in the hotel lobby"

同義詞：sneakily

Surreptitiously weakening cryptographic systems
Surreptitiously projecting different movies to two subsets of viewers.
Stealth Marketing: How to Reach Consumers Surreptitiously
Surreptitiously observed hypnotic responding in simulators and in skill-trained and untrained high hypnotizables.
Contextualism and Scepticism: Even‐Handedness, Factivity and Surreptitiously Raising Standards
Contextualism and Scepticism: Even鈥怘andedness, Factivity and Surreptitiously Raising Standards
Information-bearing article for conveying information which cannot be surreptitiously detected
Trust, privacy, and legal protection in the use of software with surreptitiously installed operations: An empirical evaluation
Method and apparatus for surreptitiously triggering the collection of data from a lost wireless communications device equipped with ...
Suspension of nurse who gave drug on consultant's instructions. Over a third of psychiatrists had given a drug surreptitiously or li...