Arsonism is a rare word that refers to the criminal act of intentionally setting fire to property. The pronunciation of this word can be broken down into individual phonetic sounds using the International Phonetic Alphabet (IPA). The IPA transcription for arsonism is /ˈɑːsənɪzəm/. This indicates that the first syllable is pronounced "ar" with a long "a" sound, followed by "son" with a short "o" sound, and "ism" with a pronounced "s" and "m" sound. While not commonly used, arsonism is a serious crime that can result in severe consequences.