surreptitiously
sur·rep·ti·tiously
adverb
1.
in a surreptitious manner
- “he was watching her surreptitiously as she waited in the hotel lobby”
Origin
From surreptitious + -ly.
Related words
Pertaining to
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.