The word "Kelderman" is pronounced /ˈkɛldərmən/. The spelling of this word is based on the traditional spelling conventions of English, which use the letters "k," "e," "l," "d," "r," "m," and "a" to represent the sounds in the word. The letter "k" indicates the initial /k/ sound, while the letter "e" represents the mid-front vowel /ɛ/. The letter "d" and "r" indicate the consonant sounds, and "a" represents the mid-central non-rounded vowel /ə/. The final "n" sound is represented by the letter "m." Overall, the spelling of "Kelderman" accurately reflects the sounds in the word.