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750 words
P/SAT / ACT Program

vigilant

[vij-uh-luhnt] [ˈvɪdʒələnt]
adjective
  • keenly alert to or heedful of trouble or danger, as while others are sleeping or unsuspicious
  • "Before they were eaten, the normally chary chipmunks (who, as it turned out, had good reason to be vigilant, on the lookout for predators) told me that..."