Hut, Wache [v] (die ~), Wacht, Bewahrung [v] (die ~), Obhut [v] (die ~), Bewachung [v] (die ~), Schutz [m] (der ~), Sicherung [v] (die ~) {zn.} protection
guard
watch
vigil
security
custody
Seien Sie auf der Hut vor Feuer.
Be on your guard against fire.
Sei vor ihm auf der Hut.
Be on your guard against him.