Answer: souped

AnswerCrossword Clue
SOUPEDMade more powerful, with "up"
SOUPEDConverted into a hot rod (with "up)".
SOUPEDFed with liquid food.
SOUPEDSupercharged (with "up").
SOUPEDSupercharged (with "up"): Slang.
SOUPED...-up, as a hot rod
SOUPED... up (like some jalopies)
SOUPEDAdded power with up
SOUPEDAdded power to a car (with "up")
SOUPEDJuiced (up)
soupedSOUP, to increase the power of efficiency of
soupedenhanced or increased in appeal, power, performance, or intensity