The phrase "hast hand in" is commonly misspelled as "has hand in". The correct spelling includes the archaic verb "hast," meaning "have," which is used in the second person singular form. The pronunciation of "hast" has a short "a" sound followed by a soft "s" sound, as in /hæst/. The word "hand" is pronounced as /hænd/, and the preposition "in" is pronounced as /ɪn/. So, the correct pronunciation of the phrase is /hæst hænd ɪn/.