For texture:
* Fine: This is the most common antonym for "coarse" when referring to texture. For example, "coarse sand" vs "fine sand".
* Smooth: This emphasizes the lack of roughness. For example, "coarse fabric" vs "smooth fabric".
* Delicate: This implies a more refined and subtle texture.
For behavior or language:
* Refined: This suggests elegance and good manners. For example, "coarse humor" vs "refined humor".
* Polished: This implies a smooth and sophisticated demeanor.
* Elegant: This describes something graceful and refined.
For other meanings:
* Subtle: This refers to something delicate and not easily noticed.
* Precise: This suggests accuracy and detail.
To find the best antonym, consider the specific meaning of "coarse" in the context of your sentence.