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"fix" is also used as a crossword clue. If that's what you saw, the answer is often repair (6 letters).
Definitions
To repair, arrange, fasten, or solve a problem.
Word origin
From Middle English fixen, borrowed from Old French *fixer (attested only as ficher, fichier; > English fitch), from fix (“fastened; fixed”), from Latin fīxus (“immovable; steady; stable; fixed”), from fīgō (“to drive in; stick; fasten”), from Proto-Indo-European *dʰeygʷ- (“to jab; stick; set”). Related to dig.
Used in a sentence
“He fixed me with a sickly grin, and said, "I told you it wouldn't work!"”
“She sniffed, too, comprehendingly, and fixed her son with a relentless eye.”
“A dab of chewing gum will fix your note to the bulletin board.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer14 curated clues
01“Correct a bug”3 letters
02“Correct a fault”3 letters
03“Make right”3 letters
04“Mend”3 letters
05“Mend a break”3 letters
06“Mend a tear”3 letters
07“Mend or repair”3 letters
08“Patch a leak”3 letters
09“Repair a crack”3 letters
10“Repair a leak”3 letters
11“Repair a problem”3 letters
12“Solve, as a problem”3 letters
13“Tight spot”3 letters
14“Repair”3 letters
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