Tundra Nenets: Delabialization of /wʲ/ → /j/ Lenition of initial /k/ → /x/ Simplification of /ʔk/ → /k/ Forest Nenets: Initial /s/ → /x/ Medial denasalization of /nʲ/ → /j/ The change of rhotics to lateral fricatives: /r/, /rʲ/ → /ɬ/, /ɬʲ/ Shortening of geminate nasals Breaking of geminate /lː/ → /nɬ/ Phonemicization of palatalized velars /kʲ/, /xʲ/, /ŋʲ/ due to vowel changes Raising of non-close vowels preceding a syllable with an original close vowel Loss of vowel distinctions in unstressed syllables Introduction of short/long contrasts for /a/ and /æ/