This is the 5072nd most frequent Chinese word.
饱
"饱" means "full" or "satiated" (usually referring to having eaten enough).
In this sentence, '饱' refers to the state of being physically full or having eaten enough.
我吃饱了,不想再吃了。
I am full and don't want to eat anymore.
Here, '饱' is not directly used, but in compound words like '背包', it indicates something's carrying capacity.
这个背包容量很大,可以装下很多东西。
This backpack has a large capacity and can hold many things.
In this context, '饱' relates metaphorically to fullness or completeness in terms of non-physical attributes like knowledge.