This rare verb describes the physical swelling that occurs when tissue becomes inflamed or distended. In Acts 28:6, the Maltese islanders expect Paul to swell up after being bitten by a viper, anticipating the typical bodily reaction to venomous snake bites. The multilingual evidence (English 'to-swell-up', Spanish 'hincharse', French 'brûlure') captures both the swelling and the burning sensation associated with inflammation.