The word "Pynoun" may seem peculiar and unfamiliar to many, but its spelling follows the International Phonetic Alphabet (IPA) phonetic transcription system. In this system, "py" represents the sound /paɪ/, similar to the "i" sound in "pie". "Noun" is spelled as it sounds, with emphasis on the "n" sound at the end. The IPA system is commonly used to correctly spell out the pronunciation of words in dictionaries and language learning materials.