Correct spelling for the English word "wert feet" is [wˈɜːt fˈiːt], [wˈɜːt fˈiːt], [w_ˈɜː_t f_ˈiː_t] (IPA phonetic alphabet).
The term wert feet does not have an established or recognized etymology. It appears to be a combination of two separate words, wert and feet, but as a whole, it does not form a meaningful or commonly used phrase. It is possible that it is a typographical or spelling error. Without additional context or information, it is difficult to provide a precise explanation for the etymology of wert feet.