sentinel
Definition
A soldier or guard stationed to keep watch or to protect a place or person.
日本語 警備員や守備員が警戒する場所や人物を守る
Example
"A lone sentinel stood at the entrance of the fortress."
A soldier or guard stationed to keep watch or to protect a place or person.
日本語 警備員や守備員が警戒する場所や人物を守る
"A lone sentinel stood at the entrance of the fortress."