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Classic usage
Reading level: hard
Estimated CEFR level: B2 — Upper-Intermediate
Estimated from word frequency; not an official CEFR classification.
1570s, from Middle French sentinelle, from Old Italian sentinella (perhaps via a notion of "perceive, watch", compare Italian sentire (“to feel, hear, smell”)), from Latin sentiō (“feel, perceive by the senses”). See sense, sentient.
lookout, lookout man, sentry, watch, spotter, scout, picket
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Classic usage
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