reveille (n.)

1640s, from French réveillez-vous "awaken!" imperative plural of réveiller "to awaken, to wake up," from Middle French re- "again" (see re-) + eveiller "to rouse," from Vulgar Latin *exvigilare, from Latin ex- "out" + vigilare "be awake, keep watch" (from PIE root *weg- "to be strong, be lively").

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