Indefectible
a. 不败的, 无瑕的
✅ 同义词
🗣️ 情景例句
I'm not sure I'm up to it.
我不能肯定我是否能做得来。
OK. Your plans are always successful.
OK，你的计划常常无往不利！
Yes, it's going to be dry and sunny for the next two days.
听了，未来两天天气干燥、晴朗。