sentinelle, garde
Sentry, make a report.
Sentinelle, faites un rapport.
— The Wind That Shakes the Barley (2006)
Sentry, what's going on up there?
Sentinelle, qu’est-ce qui se passe là-haut ?
Tell the sentry not to let anyone in.
Dites au garde de ne laisser entrer personne.
— Ivan's Childhood (1962)
He's on sentry duty.
Il est de garde.