sentry

n soldier posted outside a building, etc in order to watch or guard it 岗哨; 哨兵: People approaching the gate were challenged by the sentry. 向大门走去的人受到了哨兵的查问. * [attrib 作定语] sentry duty 哨兵的值勤.

sensual, sensualist, sensuality, sensually, sensuous, sensuously, sensuousness, sent, sentence, sententious, sententiously, sententiousness, sentient, sentiment, sentimental, sentimentalist, sentimentality, sentimentalize, sentimentalise, sentimentally, sentinel, sentry-box, Seoul, sepal, separability, separable, separably, separate, separate from, separate...from, separated, separately, separateness, separation, separatism, separatist, separator, sepia, sepsis, Sept, sept(i)-,