Negrita?

you can use "directo/a", as the type of boldness that's straightforward. "(palabras) directas". ser directo means the person doesn't beat around the bush. Implying a certain level of bad education: "descarado/a" If it's bold meaning brave, or shameless, "atrevido/a" (audaz is a little more poetic, maybe) Crudeness "crudo/con crudeza

palabras en negrilla

the words in bold = las palabras en negrita