sentinel
noun /ˈsentɪnl/
/ˈsentɪnl/
(literary)- a soldier whose job is to guard something
synonym sentry哨兵 - (figurative) a tall round tower standing sentinel over the river
镇守在河边的一座高高的圆塔 - Large dark pines stood like sentinels guarding the wintry garden.
巨大的黑松像哨兵一样守卫着冬天的花园。
词源late 16th cent.: from French sentinelle, from Italian sentinella, of unknown origin. - (figurative) a tall round tower standing sentinel over the river