Here are some other ways to say it, depending on the specific type of underwear:
* Cueca: This refers specifically to men's underwear.
* Calcinha: This refers specifically to women's underwear.
* Sunga: This is used for men's swimwear, similar to briefs.
* Biquíni: This is used for women's swimwear, similar to a bikini.
It's important to note that "roupa interior" is also sometimes used, but it's less common than "roupa íntima" and can be understood as referring to more than just underwear, including other undergarments like bras.