Fine-tune
Part of speech: verb
Definition: To make small adjustments to something until optimization is achieved
Polish
Part of speech: noun
Definition: A substance used to polish.Cleanliness; smoothness, shininess.Refinement; cleanliness in performance or presentation.
Part of speech: verb
Definition: To shine; to make a surface very smooth or shiny by rubbing, cleaning, or grinding.To refine; remove imperfections from.
Example sentence: My happiest memory of childhood was my first birthday in reform school. This teacher took an interest in me. In fact, he gave me the first birthday presents I ever got: a box of Cracker Jacks and a can of ABC shoe polish.