The word "Ustimon" is spelled as /juːstɪmɒn/. The first two letters "U" and "s" are pronounced as "yoo" and "s" respectively. The next two letters "t" and "i" represent their standard phonetic sounds. The letter "m" is followed by the letter "o" which is pronounced as "ɒ". The last two letters "n" and "e" are pronounced as "n" and "ən" respectively. The IPA transcription helps to understand the correct pronunciation of the word "Ustimon".