The correct spelling for the phrase "hast up tree" is actually "hoist up the tree." The confusion may come from the use of "hast" instead of "hoist," which is an archaic form of the word meaning "lift" or "raise." The IPA transcription for "hoist" is /hɔɪst/, with the "hoi" sound being a diphthong made up of the vowel sounds in "o" and "I." Remembering the correct spelling and pronunciation can help avoid confusion and misunderstandings in communication.