The spelling of the word "crissman" can be explained through its phonetic transcription: /ˈkrɪsmən/. The initial sound of the word is the voiceless velar fricative /k/, followed by the short vowel sound /ɪ/. The double "ss" represents the sound /s/ which is followed by the voiced bilabial nasal consonant /m/. The final sound of the word is the neutral vowel sound, called the schwa /ə/. Therefore, the correct spelling of the word "crissman" is derived from its IPA phonetic transcription.