The spelling of the word "hast influence" can be explained using the International Phonetic Alphabet (IPA). The first syllable "hast" is pronounced /hæst/, with a short "a" sound and a voiceless "h" sound. The second syllable "influence" is pronounced /ˈɪn.flu.əns/, with the stress on the second syllable and a long "i" sound. The "c" is replaced by "s" in "influence" to maintain the structure of the phrase "hast influence," which is an archaic way of saying "have influence."