8 letters · 8 points in Scrabble
noun a person employed to keep watch for some anticipated event
originFirst attested in the 1570s from Middle French sentinelle (“watch or guard kept by a soldier”), from Old Italian sentinella, probably from sentina + -ella, from sentire (“perceive, watch, hear”), from sentiō (“feel, perceive by the senses”). See also sense, sentient.
Etymology from Wiktionary, CC BY-SA 3.0