The word "Phosvel" is a trademarked name for a pesticide. Its spelling is based on the phonetic transcription of its active ingredients, namely "phos" and "vel". These ingredients are not spelled exactly as they are pronounced, but rather according to the International Phonetic Alphabet (IPA) symbols: "fɑz" for "phos" and "vɛl" for "vel". The pronunciation of "Phosvel" is therefore "fɑzvɛl". This spelling system ensures consistency in the pronunciation of the word across different languages and regions.