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alert

a·lert

alert

 
pronunciation:
luhrt
features:
Word History, Word Explorer
part of speech: adjective
definition: quick to notice and act.
The alert driver saw the child in the road and quickly stopped the car.
 
similar words:
aware, quick
derivations: alertly (adv.), alertness (n.)
Word History
The English word alert comes from a l'erte, an early French phrase that means "on guard" or "on the watch." This French phrase came from an Italian military phrase, all'erta. Erta means "a high or raised place," such as a hilltop or tower soldiers might use to see the enemy coming from a distance. All'erta meant "standing on the high tower."
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