The phrase "haddest a try" is spelled using the archaic form of the word "had" and the past participle form of "try". The correct IPA transcription for "had" in this context is /hæd/, with a short "a" sound followed by a "d" sound. "Try" is transcribed as /traɪ/, with a long "i" sound and a "t" sound. Together, the phrase is pronounced as "hæd-est uh trai," meaning "you had a go at it" in old English.