discreetly, subtly
Ahí te está mirando discretamente.
He’s discreetly watching you over there.
— La vida de Adèle (2013)
Doña Clara, mire discretamente a mi derecha.
Doña Clara, look discreetly to my right.
— Aquarius (2016)
Intente poner escuchas discretamente.
He tried to plant bugs discreetly.
— La vida de los otros (2006)