sentry

• n. 見張り、持ち場
• vi.見張りを立てる
• vt.ポストを設置する

場所や人を表すsentinel,-ryから省略された可能性があり、bakery, cavalryと比較される。もともとは見晴らし塔を意味し、後にsentinelと融合した。

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.

警備員は彼女を入れない。

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

あなたは見張り所にいるべきではありませんか。

3.to be on sentry duty

見張り

4.They often stood sentry on snowy nights.

彼らはよく雪の夜に見張りをしている。

5.The sentry is on guard.

その歩哨は警戒を務めている。