covertly
co-vert-ly
adverb
In a secret or hidden way, often to avoid being noticed or detected.
"He covertly slipped the note under the door."
Thesaurus
Antonyms: overtly
co-vert-ly
In a secret or hidden way, often to avoid being noticed or detected.
"He covertly slipped the note under the door."
Antonyms: overtly