Unobservable
a. 难以察觉的；注意不到的；不可见的
✅ 同义词
🗣️ 情景例句
She became used to the new job.
她已经习惯了那份新工作。
He admitted that he was wrong.
他承认自己错了。
The one behind my mother?
在我妈妈后边的那个吗？