It might be nothing, but I'd like you to keep a discreet eye on him, if you can.

And, of course, it also means you'll be able to keep a discreet eye on how your tenants are treating your property.

You asked me a couple of months ago to keep a discreet, apart from an official, eye on them.

The burgemeester, who was really rather a dear, allowed a discreet eye to rove over her person.

Hotel employees try to keep a discreet eye on guests' health not just when they check in but during their stay as well.

Kestrel asked nervously, keeping a discreet eye out for anyone who might be following or listening to them.

And we'll keep a discreet eye on him.

She kept a watchful, if discreet, eye on Brennan since he entered the shop.

You stay here and keep a discreet eye on him.

Someone would keep a discreet eye on the unmilitary major to make sure he did what he was supposed to do and nothing else.