The spelling of the word "radke" can be explained using the International Phonetic Alphabet (IPA) as /rædk/. The first letter "r" is pronounced as a voiced alveolar trill, the following "a" is pronounced as the short "æ" sound in CAT, the "d" is pronounced as a voiced alveolar plosive, and the final "k" is pronounced as an unvoiced velar plosive. Therefore, the correct spelling of "radke" accurately represents its phonetic pronunciation.