sentinel
US /ˈsen.t̬ɪ.nəl/
UK /ˈsen.tɪ.nəl/
名詞
哨兵
a soldier or guard whose job is to stand and keep watch.
動詞
哨兵
station a soldier or guard by (a place) to keep watch.
範例:
•
a wide course had been roped off and sentineled with police