Eastern Finnish dialects have a system of reflexive verbs that lies somewhere between conjugation and derivation. Similar systems are found in the other Eastern Finnic languages as well, such as Karelian and Ludic.
This system of reflexive verbs has occasionally been used in the written language as well, but was never standardized and is not part of Standard Finnish.
Nykysuomen sanakirja lists three different reflexive verb conjugation classes with first infinitive endings -ta, -ida and -ita respectively. The table of inflection in Nykysuomen sanakirja is as follows. According to the text, the table only contains singular personal forms:
| Class | Inf 1 | Pres. ind. | Past ind. | Cond. | Imper. | Past partic. | Past passive |
|---|---|---|---|---|---|---|---|
| I | heitätä | heitäm(m)e heitätet heitäkse(n) |
heitim(m)e heititet heittihe(n) |
heittäisim(m)e heittäisitet heittäisihe(n) |
— heitäte heitätköön |
heitännyt | heitättiin |
| II | heit(t)äidä | heit(t)äin heit(t)äit heit(t)äi(pi) |
heit(t)äin heit(t)äit heit(t)äi |
heit(t)äisin heit(t)äisit heit(t)äisi(hen) |
— heit(t)äi heit(t)äiköön |
heit(t)äinyt | heit(t)äitiin |
| III | heit(t)äitä | heit(t)äim(m)e heit(t)äitet heit(t)äikse(n) |
heit(t)äisin heit(t)äit heit(t)äisi(hen) |
heit(t)äisisin heit(t)äisisit heit(t)äisisi |
— heit(t)äite heit(t)äitköön |
heit(t)äinnyt | heit(t)äittiin |
These classes are however not strictly followed, and confusion is apparent.