fine-tune

WORDNET DICTIONARY

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

is one way to tune, tune up

Sample sentence:
Somebody ----s something

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 sentence:
Somebody ----s something

fine-tune, v. t.

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