From earlier *ěsknъ, from Proto-Balto-Slavic *áiˀšknas. Morphologically equivalent to *ěska (“bright light”) + *-nъ. Akin with Lithuanian áiškus.
Perhaps from Proto-Indo-European *h₂ey- (“to energize, to invigorate”) or *h₂eydʰ- (“to ignite”)[1]. Compare Tocharian B yesäñ, Thracian Αι̃νος (Aĩnos, “Aenus”) (town in Eastern Thrace).
singular | masculine | feminine | neuter |
---|---|---|---|
nominative | *ěsnъ | *ěsna | *ěsno |
genitive | *ěsna | *ěsny | *ěsna |
dative | *ěsnu | *ěsně | *ěsnu |
accusative | *ěsnъ | *ěsnǫ | *ěsno |
instrumental | *ěsnomь | *ěsnojǫ | *ěsnomь |
locative | *ěsně | *ěsně | *ěsně |
vocative | *ěsne | *ěsno | *ěsno |
dual | masculine | feminine | neuter |
nominative | *ěsna | *ěsně | *ěsně |
genitive | *ěsnu | *ěsnu | *ěsnu |
dative | *ěsnoma | *ěsnama | *ěsnoma |
accusative | *ěsna | *ěsně | *ěsně |
instrumental | *ěsnoma | *ěsnama | *ěsnoma |
locative | *ěsnu | *ěsnu | *ěsnu |
vocative | *ěsna | *ěsně | *ěsně |
plural | masculine | feminine | neuter |
nominative | *ěsni | *ěsny | *ěsna |
genitive | *ěsnъ | *ěsnъ | *ěsnъ |
dative | *ěsnomъ | *ěsnamъ | *ěsnomъ |
accusative | *ěsny | *ěsny | *ěsna |
instrumental | *ěsny | *ěsnami | *ěsny |
locative | *ěsněxъ | *ěsnaxъ | *ěsněxъ |
vocative | *ěsni | *ěsny | *ěsna |
singular | masculine | feminine | neuter |
---|---|---|---|
nominative | *ěsnъjь | *ěsnaja | *ěsnoje |
genitive | *ěsnajego | *ěsnyję̇ | *ěsnajego |
dative | *ěsnujemu | *ěsněji | *ěsnujemu |
accusative | *ěsnъjь | *ěsnǫjǫ | *ěsnoje |
instrumental | *ěsnyjimь | *ěsnǫjǫ | *ěsnyjimь |
locative | *ěsnějemь | *ěsněji | *ěsnějemь |
vocative | *ěsnъjь | *ěsnaja | *ěsnoje |
dual | masculine | feminine | neuter |
nominative | *ěsnaja | *ěsněji | *ěsněji |
genitive | *ěsnuju | *ěsnuju | *ěsnuju |
dative | *ěsnyjima | *ěsnyjima | *ěsnyjima |
accusative | *ěsnaja | *ěsněji | *ěsněji |
instrumental | *ěsnyjima | *ěsnyjima | *ěsnyjima |
locative | *ěsnuju | *ěsnuju | *ěsnuju |
vocative | *ěsnaja | *ěsněji | *ěsněji |
plural | masculine | feminine | neuter |
nominative | *ěsniji | *ěsnyję̇ | *ěsnaja |
genitive | *ěsnъjixъ | *ěsnъjixъ | *ěsnъjixъ |
dative | *ěsnyjimъ | *ěsnyjimъ | *ěsnyjimъ |
accusative | *ěsnyję̇ | *ěsnyję̇ | *ěsnaja |
instrumental | *ěsnyjimi | *ěsnyjimi | *ěsnyjimi |
locative | *ěsnyjixъ | *ěsnyjixъ | *ěsnyjixъ |
vocative | *ěsniji | *ěsnyję̇ | *ěsnaja |