The spelling of the word "Tueller" can be explained using the International Phonetic Alphabet (IPA). The first sound is a "t" sound, followed by a "y" sound pronounced like "ee" in "meet". The next sound is a "l" sound, and the second "e" is pronounced like "uh" in "up". Finally, the last sound is an "r" sound. Putting it all together, "Tueller" is pronounced /tuːljər/. This phonetic transcription helps to clarify the spelling of this particular word.