This is the 163rd most frequent Chinese word.
发现
"发现" means "to discover" or "to find out."
In this sentence, '发现' is used to mean 'to find' or 'to discover' something as a tangible object.
我发现桌子上有一本书。
I found a book on the table.
In this context, '发现' conveys 'to realize' or 'to notice' a change or a personal insight.
我最近发现自己越来越喜欢阅读。
I recently realized that I increasingly enjoy reading.
Here, '发现' is understood as 'to discover' or 'to perceive' something abstractly, like a trait or concept.