The spelling of the word "klock" can be explained using the International Phonetic Alphabet (IPA). The first sound is /k/, which is followed by the vowel sound /lɒ/. The final sound is /k/, which is repeated in the word. Therefore, the spelling can be simplified as "klok" with a long vowel sound in the middle. It is important to note that the spelling of words can be influenced by various factors, including regional dialects, historical changes, and language evolution.