in a surreptitious manner
"he was watching her surreptitiously as she waited in the hotel lobby"
In a surreptitious manner; stealthily, furtively, secretly.
Adverb that means to do something secretively, making efforts to hide it.
The family planned a surreptitious meeting, hours before the wedding ceremony. The bride and groom met surreptitiously before the wedding.
The numerical value of surreptitiously in Chaldean Numerology is: 2
The numerical value of surreptitiously in Pythagorean Numerology is: 4