中仏語のsentinelleから、ラテン語のsentinella, sentinelから、おそらくラテン語のsentire, to feel, hear, seeから、語源的にはsenseと同じ。
英語の語源
sentinel (n.)
1570s, from Middle French sentinelle (16c.), from Italian sentinella "a sentinel." OED says "No convincing etymology of the It. word has been proposed," but perhaps (via a notion of "perceive, watch"), from sentire "to hear," from Latin sentire "feel, perceive by the senses" (see sense (n.)).
例文
1. a tall round tower standing sentinel over the river
川辺に鎮座する高い円塔
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2.We gave the watchword,and the sentinel let us pass.
私たちがパスワードを言うと、歩哨は私たちを置き去りにした。
3.The lone sentinel walked toward his post.
憂いの歩哨が歩哨に向かった。
4. SENTINEL ?Model 880 source projectors are portable,lightweight and compact industrial radiographic exposure devices.