Definition of "underinflate" []

• To inflate too little. (verb)

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• "Not anywhere near the payback proposed since it presumes that most of us underinflate out tires, but still greater than zero."
• "Right, it wasn't the Democrats who keep us from drilling offshore, in ANWR and the shale, it was those eeeeevil Republican pit bulls in Washington scheming to keep oil prices high, while sending Karl Rove out to secretly underinflate everyone's tires and lull them into believing they won't need a tune-up for at least 100,000 miles or so."
• "IIRC, the only way Nader’s operatives could get the Corvair to flip on turns was to underinflate the outside tires and hacksaw the inside shocks in two."