-inas

-īnās

1. accusative feminine plural of -īnus

From Proto-Balto-Slavic *īˀnas, from Proto-Indo-European *-iHnos. Compare the suffixes Old Prussian -ins and Proto-Slavic *-ьnъ in the words awins (“ram”) and *ovьnъ (“ram”) respectively.

-inas m stress pattern 3

1. produces masculine nouns from feminines, usually signifying a male animal

   ‎antis (“duck”) + ‎-inas → ‎antinas (“drake”)

Presumably related to -inis. See for more.

-inas m (feminine -inà) stress pattern 3

1. forms adjectives from nouns with the meaning "characterised by" or "abundant with" the root word

-inas

1. feminine plural of -ín