The spelling of the word "KOLU" can be explained using the International Phonetic Alphabet (IPA). The first letter "K" represents the voiceless velar stop sound /k/. The second letter "O" represents the open-mid back rounded vowel sound /ɔ/. The third letter "L" represents the voiced alveolar lateral approximant sound /l/. The final letter "U" represents the close back rounded vowel sound /u/. Therefore, "KOLU" is pronounced as /kɔlu/.