Blackfoot nouns have endings for singular or plural. To better understand number in Blackfoot, let’s take a look at the nouns ponoká ‘elk’ and soksistsikó ‘cloud’.

Blackfoot English Number
ponokáwa ‘elk’ SINGULAR
ponokáíksi ‘elks’ PLURAL
Blackfoot English Number
soksistsikóyi ‘cloud’ SINGULAR
soksistsikóístsi ‘clouds’ PLURAL

For the noun stem ponoká, the ending –wa indicates that it is singular and –iksi indicates that it is plural. For the noun stem soksistsikó, the ending –yi indicates that it is singular and –istsi indicates that it is plural.