RichThesaurus
clandestinely
vs
on the q.t.
clandestinely
adv
In a secret or covert manner.
In an illicit way, i.e. not permitted by the law or regulations.
on the q.t.
How often have the words
clandestinely
and
on the q.t.
occurred in a corpus of books?
(source:
Google Ngram Viewer
)