The word "undergentleman" is not a common one, and some may struggle to spell it correctly. It is pronounced as /ʌndərˈdʒɛntlmən/, with the stress on the second syllable. The prefix "under" indicates that this person is in a lower position of authority than a gentleman. However, the word "undergentleman" is not widely used, and "servant" or "assistant" may be better alternatives. It is important to have a good understanding of phonetic transcription when learning to spell unusual words.