Serenest
serene（沉静的, 宁静的, 安宁的）的最高级形式
🗣️ 情景例句
Because the job was not challenging enough.
因为那份工作挑战性不够。
I expect so.
我料想是这样。
No one suspected that there might be someone else on the farm who had never been seen.
谁也没想到农场竟会有一个从未露面的人。