| 词汇 | sentry |
| 词根词缀 | 词源： 1611, originally "watchtower;" perhaps a shortened variant of sentinel (q.v.), which had a variant form centrinel (1598), or worn down from sanctuary, on notion of "shelter for a watchman." Meaning "military guard posted around a camp" is first attested 1632. Sentry-box is from 1728. |
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