Late Latin prōde (est), by reanalysis of Latin prōdest (it) is beneficial, of use, with prōde taken as a neuter noun, nominal (compare proud); v by association with prove,approve
Anglo-French emprouer to turn (something) into profit, derivative of phrase en prou into profit, equivalent. to en (see en-1) + prou, Old French prou, preu
late Middle English improuen, emprouen 1425–75
1.See corresponding entry in Unabridged amend, emend. Improve,ameliorate,better imply bringing to a more desirable state. Improve usually implies remedying a lack or a felt need:to improve a process, oneself(as by gaining more knowledge). Ameliorate, a formal word, implies improving oppressive, unjust, or difficult conditions:to ameliorate working conditions.To better is to improve conditions which, though not bad, are unsatisfying:to better an attempt, oneself( gain a higher salary).
1, 5.See corresponding entry in Unabridged worsen.
(transitive) to make (buildings, land, etc) more valuable by additions or betterment
(intr; usually followed by on or upon) to achieve a better standard or quality in comparison (with): to improve on last year's crop
Etymology: 16th Century: from Anglo-French emprouer to turn to profit, from en prou into profit, from prou profit, from Late Latin prōde beneficial, from Latin prōdesse to be advantageous, from pro-1 + esse to be