Incommutable
a. 不能改变的, 不能变换的
✅ 同义词
🗣️ 情景例句
She's really a good friend, isn't she?
她真是我的好朋友，不是吗？
Water dropping day by day wears the hardest rock away.
水滴天天滴不停，石头最坚也磨损。
This model's less expensive than that one.
这种型号比那种要便宜些。