Formal:
* Compreender: This is the most general and formal translation. It can be used in any situation.
* Entender: This is another formal option, slightly more common than "compreender".
Informal:
* Entender: This is also the most common informal translation.
* Pegar: This is a more colloquial way of saying "understand", often used in informal settings.
* Captar: This is similar to "pegar" but can also be used in more formal contexts.
Here are some examples:
* Eu compreendo o que você está dizendo. (I understand what you're saying.)
* Entendo seu ponto de vista. (I understand your point of view.)
* Peguei a ideia. (I got it.)
* Não entendi nada. (I didn't understand anything.)
* Você pode me explicar? Não captei. (Can you explain it to me? I didn't get it.)
The best translation for "understand" will depend on the specific situation and your level of formality.