secretively
Adverb
Meaning
in a secretive manner; with a preference for secrecy
Source: WordNetSynonyms
secretly
mysteriously
covertly
stealthily
confidentially
furtively
enigmatically
privately
cagily
latently
insociably
Antonyms
Examples
the teacher raised a hand to him, slightly and secretively, because he was her favorite
He secretively borrowed funds, pawned his mother's jewellery and made preparations with a consortium of privateers.
Stowe (1999), 26. Nancy is shown either boldly in the center of the action or actively, but secretively, investigating a clue.