improved; improving
Definition of improve
1a
: to enhance in value or quality : make better
b
: to increase the value of (land or property) by making it more useful for humans (as by cultivation or the erection of buildings)
c
: to grade and drain (a road) and apply surfacing material other than pavement
2
: to use to good purpose
1
: to advance or make progress in what is desirable
2
: to make useful additions or amendments
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Merriam-Webster unabridged
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Time Traveler for improve
The first known use of improve was in 1509
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