das Wörterbuch Englisch Minus Englisch

done or made secretly so that others will not notice Englisch:

Spenser would not tell anyone his surreptitious plan to get back at his friends for pranking him.

She seemed to be listening to what I was saying, but I couldn't help noticing her surreptitious glances at the clock.

The surreptitious CBA agents were able to get in and out without anyone noticing

He shot her a surreptitious glance.

I have said something about the grey area, in other words, the surreptitious advertising which you also mentioned.

The dog has his surreptitious ways of stealing table scraps behind my back.

surreptitious moves to deprive him of the throne