Is this your crossword clue?
"quadruple" is also used as a crossword clue. If that's what you saw, the answer is often fourfold (8 letters).
Definitions
To make or become four times as large or numerous.
Word origin
From Middle English quadruple, from Latin quadruplus. Can be analyzed as quadri- + -ple.
Used in a sentence
“He's quite an athlete and can do quadruple jumps with ease.”
“Quadrupling four gives sixteen.”
“Our profits quadrupled when we made the improvements.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Fourfold”9 letters
Not quite right?
"Search similar patterns."
Q________