The spelling of the word "Kesting" can be explained using the International Phonetic Alphabet (IPA). The "k" is pronounced as /k/, the "e" as /ɛ/, the "s" as /s/, the "t" as /t/, the "i" as /ɪ/, the "n" as /n/ and the "g" as /g/. The word has two syllables and is pronounced as /ˈkɛstɪŋ/. The phonetic transcription helps to accurately represent the sounds used in spoken language and aids in language learning and pronunciation.