The spelling of the word "in tend" can be a bit tricky due to its pronunciation. Using the IPA phonetic transcription, we can see that the word has two syllables pronounced as /ɪn/ and /tɛnd/. The vowel sound in the first syllable is the short "i" as in "pin." Meanwhile, the second syllable has the /ɛ/ vowel sound as in "end." Therefore, the word is spelled as "in tend" to be more phonetically accurate in representing the sounds in the word.