This is the 390th most frequent Portuguese word.
entender
To understand.
Here, 'entender' is used in its literal sense of comprehending or grasping information.
Eu entendo o que você está dizendo.
I understand what you are saying.
In this sentence, 'entender' refers to the act of learning or being aware of rules or concepts.
É importante entender as regras antes de jogar.
It is important to understand the rules before playing.
Here, 'entender' is used in the reflexive passive sense where the meaning is to be understood by others.