The spelling of the word "Kellven" can be explained using the International Phonetic Alphabet (IPA). The first sound, "k", is a voiceless velar stop. The second sound, "e", is a mid front unrounded vowel. The double "ll" in the middle represents a geminate, or double-length, consonant, pronounced with a prolonged closure of the articulators. The final sound, "ven", consists of a voiced labiodental fricative followed by a voiced alveolar nasal. Overall, the spelling accurately reflects the phonetic sounds of the word.