Firmest
firm（坚固的, 坚牢的）的最高级形式
🗣️ 情景例句
The number's no longer in service.
这个号码现在是空号。
What will you do during this weekend?
这周末你干什么？
You have to be able to plan your work so that all your jobs will be finished in time.
以便你的工作能及时完成。