The spelling of the word "rohatgi" is quite straightforward if you are familiar with the International Phonetic Alphabet (IPA). The word is pronounced as 'roʊhætgi' with the emphasis on the first syllable. The 'oʊ' sound represents a diphthong consisting of 'o' and 'a', while the 'æ' sound is the short 'a' as in 'cat'. The 'tgi' ending is pronounced as 'tɡi', where the 't' has a soft 'd' sound and the 'g' sound is pronounced as a combination of 'g' and 'i'.