The spelling of the word "weidner" can be explained using the International Phonetic Alphabet (IPA). The pronunciation of "weidner" is /ˈwaɪdnər/. The first syllable "wei" is pronounced as /waɪ/, where "w" is pronounced as in "will" and "ai" is pronounced as in "fine". The second syllable "dner" is pronounced as /dnər/, where "d" is pronounced as in "dog" and "nər" is pronounced as in "banner". Therefore, the correct spelling of "weidner" represents the phonetic sounds of its pronunciation.