Regular sound correspondences between Hungarian and other Uralic languages a different fashion. (Again, with the help of the other Uralic languages, the analogous developments *mp *ŋk → Hungarian /b g/, Finnic /mp ŋk/ could be supported.) Two different regular correspondences can be found in Hungarian for Finnish and Estonian . The first is Hungarian : The second is Hungarian zero: These two correspondences represent two different original consonants. : is reconstructed as originating in Proto-Uralic *ś, while ∅ : is reconstructed as Proto-Uralic *s. Both correspondences can be seen simultaneously in the word for "autumn" (see above under *-k-), from Proto-Uralic *sükśi. Examples also include 'bit', 'to fear', 'cloud',
Uralic–Yukaghir languages linguistic science may yet be able to resolve some of these seemingly intractable issues (cf. Vajda 2008). Häkkinen (2012) rejects a genetic link between Uralic and Yukaghir, arguing that the grammatical systems show too few convincing resemblances, especially the morphology, and proposes instead that many apparent Uralic–Yukaghir cognates are really borrowed from an early stage of Uralic (ca. 3000 BC; he dates Proto-Uralic at ca. 2000 BC) into an early stage of Yukaghir, while Uralic was (according to him) spoken near the Sayan region and Yukaghir near the Upper Lena River and near Lake Baikal. Aikio (2014) agrees that Uralic–Yukaghir