The spelling of the word "grundman" is fairly straightforward once you learn how to read phonetic transcriptions. The IPA phonetic transcription of "grundman" is /ˈɡrʌndmən/. The first syllable "grun" is pronounced with a short "u" sound like "uh" and the "d" and "m" sounds are pronounced distinctly. The second syllable "man" is pronounced with a short "a" sound like "cat" and a schwa sound at the end. Therefore, "grundman" is spelled with a "u" in the first syllable and an "a" in the second syllable.