Accusatif, Accusative, Avestique, Avestan, Diphtongue, Diphthong, Flexion, Inflection, Morphologie, Morphology, Phonologie, Phonology, Religion, Indo-iranien, Avestan phonology, Indo-Iranian nominal morphology, Zurvanism, long-diphthong inflection, Sciences du langage, Linguistics, Etudes descriptives et applications des théories, and Descriptive studies and applied theories
The paradigm of Avestan vaiiu- 'atmosphere, wind' is puzzling because of the seemingly thematic accusative sg. vaēm and because of its short root vowel a that stands in contrast to both the Old Indic counterpart vāyú- < Indo-Iranian *HṷaH-iu- and the two parallel Avestan stems pdiiu- 'shepherd' and tāiiu- 'thief'. A usually neglected accusative singular form, transmitted only in Ny I.I and Ny I.2, provides a key to the issue: vaiiąm, rather than being an irregular by-form of vaēm, appears to be the original acc. sg., which implies that vaiiu- was originally a long-diphthong inflecting paradigm with Proto-Avestan nom. sg. *ṷāiāṷš, acc. sg. *ṷāiā(ṷ)m via lex Stang → *ṷāiām. This preform provides a better context for the shortening of *āia/ā > *aia/ā, yielding the final root shape of vaiiu-.