| 例句 |
sentrynoun a person or group that watches over someone or somethinga sentry posted to watch for intruders custodian, guard, guardian, keeper, lookout, minder, picket, sentinel, warden, warder, watch, watcher, watchman observer, patrol, spotter, surveillant, watchdogbodyguard, convoy, defender, escort, honor guardgatekeeperhack(slang) in 1608 |