The spelling of the word "Welden" can be explained through the use of IPA phonetic transcription. The first syllable is pronounced with the "w" sound as in "well" and the "eh" vowel sound as in "get". The second syllable is pronounced with the "l" sound as in "light" and the "d" sound as in "dog". Therefore, the correct spelling of the word is "Welden" and it is pronounced as "wel-dən" with the stress on the first syllable.