sentry

可能缩写自 sentinel,-ry,表地点或人，比较 bakery,cavalry.原义为眺望塔，后与 sentinel 词义融 合。

sentry

sentry: [17] Sentry is probably short for the now obsolete centrinell ‘sentry’. This first appeared in the 16th century as a variant of sentinel [16], which came via French sentinelle from Italian sentinella. It is not altogether clear where the Italian noun came from, but it may well have been derived from the verb sentire ‘perceive, watch’, a descendant of Latin sentīre ‘feel’ (from which English gets sense, sentence, sentiment, etc).
=> sentinel

sentry (n.)

1610s, originally "watchtower;" perhaps a shortened variant of sentinel, which had a variant form centrinel (1590s); or perhaps worn down from sanctuary, on notion of "shelter for a watchman." Meaning "military guard posted around a camp" is first attested 1630s. Sentry-box is from 1728.

1. The sentry would not let her enter.

警卫不让她进去。

2. Aren't you supposed to be on sentry duty?

你不是应该在站岗吗？

3. to be on sentry duty

放哨

4. They often stood sentry on snowy nights.

他们常常在雪夜放哨.

5. The sentry is on guard.

那哨兵在担任警戒.