The fact or process of re-equipping or modifying something.(noun)
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Use "retooling" in a sentence
"Perhaps this kind of retooling is what they needed."
"But they also help explain why the phenomenon still appeals and why its retooling is aiding something of a rebirth with the "millennial" generation."
"To control spending, the program might give priority to people with healthy habits; no point in retooling the genomes of smokers, risk takers, and addicts of all kinds."