The correct spelling of the phrase "hast propensity" is actually "has propensity." The word "has" is the third person singular present tense form of the verb "have", and "propensity" refers to a natural tendency or inclination towards something. The pronunciation of "has propensity" is /hæz prəˈpɛnsəti/ in the International Phonetic Alphabet (IPA). It's important to use correct spelling and phonetic transcription to effectively communicate your message and avoid confusion.