-vat

Etymology 1
From *-bat, the plural of (present active participle suffix). , noun plural ending, is also used as the third-person plural ending in some dialects (including once in the standard language), hinting that this is originally an extension, likely to distinguish from the second-person singular. is originally an eastern Finnish feature and has been standard only since the early 19th century.

Usage notes

 * Suffixed to the same stem that the first person singular has both in the present and the past tense, and in all moods.
 * Colloquially, the third-person singular is often used instead of the plural.