- surreptitiously
- adv1. clandestinely, covertly, under cover, stealthily, under the table or counter; collu-sively, conspiratorily, furtively, underhandedly, sneak-ily, craftily, cunningly, slyly, on the sly, behind one's back, behind the scenes; unethically, dishonorably, illegally, unlawfully, fraudulently.2. secretly, privately, in private, behind closed doors, confidentially, sub rosa; silently, mysteriously, in the dark; in a whisper, aside.
A Note on the Style of the synonym finder. 2014.