Feminine nouns in Latvian end in the Nominative (Nominatīvs, N.) case in -a, -e, or -s. Depending on the ending, nouns belong to one of the three declensions (IV–VI).
For the fourth and fifth declensions, the ending of the plural is formed by adding -s: -as, -es. In the third declension the plural ending is -i.
Examples
istaba
room
grāmata
book
biļete
ticket
upe
river
uguns
fire
valsts
state (country)
Declensions
The ending of the Nominative form denotes the declension of the noun and the correspondent set of rules for other cases.