-ttain

Etymology
A variant of earlier and still dialectal, probably from *-ttaden (possibly related to 🇨🇬, and 🇨🇬), re-extracted from the second infinitive instructive forms of verbs ending in. The instructive case has distributive meanings in dialects, with such uses attested in Kalevala.

Usage notes

 * This suffix is usually appended to the weak plural stem; see examples above.