-sto

Etymology
From earlier, from +  (like in ) + , all noun-forming suffixes.

Declension

 * The most common genitive and partitive plural forms for nouns are  and, which correspond to declension type 1 . Kielitoimiston sanakirja classifies many but not all three-syllable words with this suffix as type 2  despite the fact that the forms ending in / and  are rarely used in practice.

Etymology
Akin to 🇨🇬.