The word "firefanged" is spelled with two syllables: /ˈfaɪərfeɪŋd/. The first syllable starts with the long "i" sound, written as "i" followed by "r". The second syllable starts with the "f" sound followed by the diphthong "ei", written as "e" followed by "i". The word means to have teeth that are exposed due to an animal opening its mouth wide, typically in a display of aggression or dominance. It is not a commonly used word in modern English.