refined
adj.adj. having good taste and high quality, or being improved to a very high level. You use this to describe someone who is polite and educated, or a process that has become very effective.
adj. characterised by elegance, sophistication, or a high degree of precision. Often describes products that have been processed to remove impurities or systems that have been polished through iterative improvement.
She has a very refined way of speaking.
The engineers spent months testing the engine until they achieved a more refined and fuel-efficient design.
His refined palate allowed him to distinguish the subtle notes of oak and vanilla that less experienced tasters often missed entirely.
Commonly modifies abstract nouns like 'taste', 'technique', or 'style', as well as physical substances like 'sugar' or 'oil'.