stern

The headmaster gave the misbehaving students a stern look that immediately silenced the room.

(Chinese) 校长对表现不好的学生投以严厉的目光，房间里立刻安静了下来。

Despite his stern outward appearance, the coach cared deeply about the success of his players.

(Chinese) 尽管外表严厉，教练却非常关心球员的成功。

The fishermen stood at the stern of the boat to cast their nets into the deep water.

(Chinese) 渔民们站在船尾，将网撒入深水中。

The ferry's name was painted in large white letters across the stern, just above the water line.

(Chinese) 渡轮的名字用白色大写字母漆在船尾，就在吃水线正上方。