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become or made better in quality
made more desirable or valuable or profitable
perform without preparation
a condition superior to an earlier condition
the act of improving something
the act of improving yourself
someone devoted to the promotion of human welfare and to social reforms
a change for the better
to make better
susceptible of improvement
(of land) made ready for development or agriculture by clearing of trees and brush
a component that is added to something to improve it
getting higher or more vigorous