Absolute and advanced are synonyms for refined. Crude is the opposite of refined. We have given below a collection of synonyms for "refined".
There is no harm in going through a sophisticated school or college, dressed well and looking perfect. A refined person does not have a set personality description. Rather, they are people who know who they are. Whether that person is an introverted type of person or someone who has excellent social skills, that person just keeps on doing their job. For example, gold and silver are delivered in a refined state suitable for instant coin conversion.