Formal:
* Compris: This is the most direct and formal translation. It literally means "understood" and is suitable for professional or academic settings.
Informal:
* D'accord: This is the most common way to say "understood" in informal situations. It literally means "in agreement" and is similar to saying "okay" in English.
* Bien compris: This is another informal option that means "well understood."
* J'ai compris: This is a more literal translation of "I understood" and can be used in both formal and informal situations.
* Entendu: This is a slightly less common option, but it also means "understood" and is suitable for both formal and informal situations.
Other options:
* Je comprends: This means "I understand" and is a good option if you want to acknowledge that you are listening and understanding what is being said.
* C'est clair: This means "it's clear" and is a good option if you want to indicate that you have understood something that was previously unclear.
The best way to choose the right phrase is to consider the context of the conversation and the relationship between you and the person you are speaking to.