Product noun of *na- (“on”) + *piti (“to drink”), from an earlier u-stem Proto-Slavic *napitъ, extended with *-ъkъ. Possibly traces back to Proto-Balto-Slavic *peitus, based on the comparison with Lithuanian piẽtūs pl (“lunch, dinner”). The Lithuanian lemma differs slightly in meaning (and moreover exhibits mobile AP 4), which makes the relation to the Slavic lemma questionable.
Comparison with other languages points towards possible descend from Proto-Indo-European *peHy- (“to feed, to drink”) (see *peh₂- (“to nourish”), *peh₃- (“to drink”)). This root has lost its laryngeal already in pre-Balto-Slavic times due to Pinault's rule, hence, there is no trace of acute in Balto-Slavic. Probably also cognate with Sanskrit पितु (pitu, “juice, drink”) (see there for further discussion). It is possible that Proto-Indo-European *peyH- (“fat”) relates to the mentioned roots via Schwebeablaut.
*napitъkъ m
singular | dual | plural | |
---|---|---|---|
nominative | *napitъkъ | *napitъka | *napitъci |
genitive | *napitъka | *napitъku | *napitъkъ |
dative | *napitъku | *napitъkoma | *napitъkomъ |
accusative | *napitъkъ | *napitъka | *napitъky |
instrumental | *napitъkъmь, *napitъkomь* | *napitъkoma | *napitъkȳ |
locative | *napitъcě | *napitъku | *napitъcě̄xъ |
vocative | *napitъče | *napitъka | *napitъci |
* -ъmь in North Slavic, -omь in South Slavic.