Verb type 6 (-eta/-etä)

Verb Type 6 and the -ne- stem

Verb Type 6 consists of verbs ending in -eta or -etä. These verbs usually describe a physical transformation or a change in state, size, or quality—such as cooling down, getting dark, or shrinking.

To form the present tense stem, drop the -ta or -tä from the infinitive and add -ne-. Type 6 verbs undergo consonant gradation in reverse: the infinitive is weak and the conjugated forms are strong (e.g., lämmetä becomes lämpenee).

Add the standard personal ending to this stem. For the third-person singular, this means doubling the final vowel (-nee).

For the present negative, simply use the negative verb (like ei) alongside the plain -ne- stem.

The air cools down in the evening, but the sauna warms up.
Ilma viilenee illalla, mutta sauna lämpenee.
The oven does not get hot if the door is open.
Uuni ei kuumene, jos ovi on auki.
The problem gets larger if the budget gets smaller.
Ongelma suurenee, jos budjetti pienenee.

The past tense

To talk about changes that already happened, the -ne- stem changes to -ni-. For the third-person singular (hän / se), you do not double the final vowel; the word simply ends in -ni.

The coffee got cold quickly when we were outside.
Kahvi kylmeni nopeasti, kun olimme ulkona.
I was swimming when the evening got dark.
Olin uimassa, kun ilta pimeni.
The queue got shorter, and the store also emptied.
Jono lyheni, ja kauppakin tyhjeni.

The past negative

As with other verbs, forming the past negative requires the negative verb (such as en, et, or ei) plus the past participle.

For Verb Type 6, build the singular past participle by dropping the -ta or -tä from the infinitive and adding -nnut or -nnyt (following vowel harmony rules). Notice that the past participle uses the weak consonant grade, just like the infinitive.

InfinitivePresentPastPast Negative
viiletäviileneeviileniei viilennyt
kuumetakuumeneekuumeniei kuumennut
lämmetälämpeneelämpeniei lämmennyt
The dough did not harden, but it cooled down.
Taikina ei kovennut, mutta se viileni.
The sauna did not warm up, because the door was open.
Sauna ei lämmennyt, koska ovi oli auki.
The street did not empty, even though it snowed.
Katu ei tyhjennyt, vaikka satoi lunta.