0 the quality of doing something secretly without anyone seeing or knowing:
the surreptitiousness of the group's activities
Why was there a need for this surreptitiousness?
The study showed that authoritarianism led to more surreptitiousness on the part of students.
Did the surreptitiousness of the recording mean it could not be used in court?
Suspicion does not refer to something absent or hidden; rather, it is the surreptitiousness that is produced methodically which guarantees the unremitting practice of the techniques of power.
If there had been any surreptitiousness it has been fully-unmasked for more than a year past.
