Unknown. According to Matasović, likely a substrate word.
*birros
O/ā-stem | |||
---|---|---|---|
masculine | singular | dual | plural |
nominative | *birros | *birrou | *birroi |
vocative | *birre | *birrou | *birroi |
accusative | *birrom | *birrou | *birroms |
genitive | *birrī | *birrous | *birrom |
dative | *birrūi | *birrobom | *birrobos |
instrumental | *birrū | *birrobim | *birrobis |
feminine | singular | dual | plural |
nominative | *birrā | *birrai | *birrās |
vocative | *birrā | *birrai | *birrās |
accusative | *birram | *birrai | *birrams |
genitive | *birrās | *birrous | *birrom |
dative | *birrai | *birrābom | *birrābos |
instrumental | *? | *birrābim | *birrābis |
neuter | singular | dual | plural |
nominative | *birrom | *birrou | *birrā |
vocative | *birrom | *birrou | *birrā |
accusative | *birrom | *birrou | *birrā |
genitive | *birrī | *birrous | *birrom |
dative | *birrūi | *birrobom | *birrobos |
instrumental | *birrū | *birrobim | *birrobis |