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"decrease" is also used as a crossword clue. If that's what you saw, the answer is often lessening (9 letters).
Definitions
decrease in size, extent, or range
Word origin
From Middle English decresen, alteration of discresen, from Anglo-Norman, Old French descreistre (French: décroître), from Latin decrescere.
Used in a sentence
“The quality of our products has decreased since the main designer left.”
“Let's decrease the volume a little so we can hear each other talking.”
“After six years of constant growth, the company reported a slight decrease in sales last year.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Make less”8 letters
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