the.com/refine
Taking something already good and beating the impurities out of it until it gleams.
means To improve something by removing flaws, excess, or crudeness, making it purer, sharper, or more polished.
from From French raffiner, built on Latin finis (end, limit) — literally driving something toward its finished, ultimate state.
Sugar and metalOriginal refining cleaned ore and crystallized sugar.
Iterative cousinDrafts, code, and recipes all get refined.
Person tooRefined manners means social rough edges sanded off.