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"improve" is also used as a crossword clue. If that's what you saw, the answer is often enhance (7 letters).
Definitions
To make or become better.
Word origin
From Anglo-Norman emprouwer, from Old French en- + prou (“profit”), from Vulgar Latin prode (“advantageous, profitable”).
Used in a sentence
“Painting the woodwork will improve this house.”
“Buying more servers would improve performance.”
“I have improved since taking the tablets.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Make better”7 letters
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