"Sartain" is a surname that is pronounced as /sɑːrteɪn/ in IPA phonetic transcription. The first syllable "sar" is pronounced as /sɑːr/, which rhymes with "car". The second syllable "tain" is pronounced as /teɪn/, which rhymes with "cane". The spelling of "sartain" follows the English language's irregularities in pronunciation, where the letters "ai" produce the sound of the long "a" as in "mate". It is important to use IPA to accurately transcribe the sounds of words to avoid confusion and misinterpretation.