How to Say "underpants" in Spanish
The Spanish word for “underpants” is “calzoncillos” — A1 level. This is a very common word in everyday Spanish.
English → SpanishA1
nounA1
men's underwear

Examples
Tengo que comprar calzoncillos nuevos.
I have to buy new underpants.
¿Dónde pusiste mis calzoncillos limpios?
Where did you put my clean underwear?
Prefiero los calzoncillos de algodón.
I prefer cotton briefs.
Always Plural
Just like 'pants' or 'scissors' in English, we usually use this word in its plural form even when talking about just one item.
Singular vs. Plural
Mistake: “Busco un calzoncillo.”
Correction: Busco unos calzoncillos.
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.