Soldiers or guards who stand watch and protect a place from intruders or danger.
From French 'sentinelle,' which came from Italian 'sentinella,' possibly from Latin 'sentire' (to feel or perceive). The term originally meant someone who was alert and watchful.
Medieval castles relied on sentries called 'sentinels' at every gate, and they developed complex whistle and horn systems to communicate danger across long distances—the original alarm system!
Complete word intelligence in one call. Free tier — 50 lookups/day.