ruien

Etymology
With regular syncope of intervocalic -d- from earlier, from (attested in derived terms). Probably from, whence archaic 🇨🇬, an ablaut variant of , whence ,.

Alternatively compare perhaps, regionally also , , from , as hair loss is one of the main symptoms of mange in animals. The latter is probably related with, to which compare the variant above (though the -v- can also be explained as the fortition of an epenthetic -w- in hiatus).

Verb

 * 1) to moult, to shed (of animals; lose a covering of fur, feathers or skin etc.)