The spelling of "its dealt" can be explained through IPA phonetic transcription. /ɪts/ represents the pronunciation of "its," which is the possessive form of "it." This is spelled with the letters "i-t-s" because the sound represented by the letter "i" in this case is the short vowel sound of /ɪ/. /dɛlt/ represents the pronunciation of "dealt," which is the past participle form of the verb "deal." This is spelled with the letters "d-e-a-l-t" because the sound represented by the letters "ea" in this case is the diphthong sound of /ɛl/.