The word "vandermark" is a surname that is pronounced /vændərmɑːrk/. The phonetic transcription shows that the first syllable is stressed and pronounced as "van". The second syllable starts with a "d" sound, followed by the "er" sound and ends with the "mark" sound. The "a" is pronounced as in "father" and the final "rk" sounds like a blend of "r" and "k". The spelling of this word follows typical English spelling rules for compound words.