How to Say "coarse" in Spanish
The Spanish word for “coarse” is “grosero” — B2 level.
English → SpanishB2
AdjectiveB2neutral/formal
texture or quality

Examples
El pintor usó un pincel de cerdas muy groseras.
The painter used a brush with very coarse bristles.
Necesitamos sal grosera para sazonar la carne.
We need coarse salt to season the meat.
Physical Description
In this sense, 'grosero' describes the physical quality or texture of an object, like sand, fabric, or salt.
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