1.  fine-tune(v = verb.change) down, polish, refine - improve or perfect by pruning or polishing; "refine one's style of writing"
is one way to ameliorate, amend, better, improve, meliorate
Sample sentences: Somebody ----s something; Somebody ----s somebody; Something ----s somebody

2.  fine-tune(v = verb.change) tweak - adjust finely; "fine-tune the engine"
is one way to tune, tune up
Sample sentences: Somebody ----s something

3.  fine-tune(v = verb.change) calibrate, graduate - make fine adjustments or divide into marked intervals for optimal measuring; "calibrate an instrument"; "graduate a cylinder"
is one way to adjust, correct, set
Sample sentences: Somebody ----s something

   to adjust carefully and precisely so as to achieve optimum performance or efficiency; as, The mechanic fine-tuned the engine. [WordNet 1.5]