-kaan/-kään is the negative half of a matched pair. Where the affirmative -kin adds a word to a positive statement ("me too"), -kaan/-kään adds a word to a negative one ("me neither"). It is the single most reliable signal in Finnish that a clause is negated — and, unlike its invariant twin, it obeys vowel harmony.
The polarity switch: -kin ↔ -kaan/-kään
English uses the same little word — too, or either — and lets the surrounding verb carry the polarity. Finnish flips the clitic itself. A positive sentence takes -kin; negate the verb, and the clitic must become -kaan/-kään.
| Affirmative (-kin) | Negative (-kaan/-kään) |
|---|---|
| Minäkin tulen. (I'm coming too.) | En minäkään tule. (I'm not coming either.) |
| Sekin on totta. (That's true too.) | Ei sekään ole totta. (That's not true either.) |
| Hänkin tietää. (He knows too.) | Ei hänkään tiedä. (He doesn't know either.) |
En minäkään tiedä.
I don't know either.
Ei sekään auta.
That doesn't help either.
It cannot appear without a negation
-kaan/-kään is polarity-sensitive: it needs a licensing negation somewhere in the clause. You cannot use it to build a stand-alone "either" the way English can ("Me neither" as a bare reply still hides a negation). In Finnish the negative verb must be present and conjugated for person.
Emme mekään tienneet siitä.
We didn't know about it either.
Et sinäkään ole täydellinen.
You're not perfect either.
Ei täälläkään ole kahvia.
There's no coffee here either.
In every one of these the negator (emme, et, ei) does the grammatical heavy lifting, and -kaan/-kään rides along to mark which element is being added to the negative set. Drop the negator and the sentence collapses — *Minäkään tulen is simply not Finnish.
Harmony: -kaan after back, -kään after front
Unlike -kin, this clitic harmonizes. Back-vowel hosts take -kaan; front-vowel hosts take -kään. Remember the Finnish rule that a word built only from the neutral vowels e and i counts as front for harmony — so se and ei take -kään.
| Host | Harmony |
|
|---|---|---|
| Pekka | back (a) | Pekkakaan |
| talossa (in the house) | back (a, o) | talossakaan |
| minä | front (ä) | minäkään |
| hän | front (ä) | hänkään |
| se (that), ei (not) | neutral → front | sekään, eikään |
| syö (eat) | front (ö) | syökään |
En syökään lihaa.
I don't eat meat either.
Ei Pekkakaan tullut juhliin.
Pekka didn't come to the party either.
Watch the pairing of vowels: syö ends in the front vowel ö, so the clitic is -kään (never *syökaan); Pekka is all back vowels, so -kaan. Get the host's harmony right and the clitic follows automatically.
Concord with the negative verb
The clean way to think about -kaan/-kään is as one half of negative concord: the negative verb and the clitic agree that the clause is negative, the same way an adjective agrees with its noun. This is why a bare minäkään with a positive verb feels broken to a Finn — it is a negative word stranded without its negative partner. When you coordinate two negatives, the concord even reaches across a clause boundary.
Hän ei tullut, enkä minäkään.
He didn't come, and neither did I.
Here enkä (en + the coordinating -kä) and minäkään both belong to the negation — two markers, one negative meaning. This tight cooperation between negator and clitic — a kind of negative concord — is covered further under the negative verb and how negation works.
Common Mistakes
❌ Minäkin en tule.
Incorrect — a negated clause cannot keep -kin.
✅ En minäkään tule.
I'm not coming either.
❌ Minäkään tulen.
Incorrect — -kaan/-kään needs a negative verb to license it.
✅ En minäkään tule.
I'm not coming either.
❌ En syökaan lihaa.
Incorrect harmony — the front-vowel host syö forces -kään.
✅ En syökään lihaa.
I don't eat meat either.
❌ Ei hänkaan tiedä.
Incorrect harmony — hän is front, so -kään.
✅ Ei hänkään tiedä.
He doesn't know either.
The number-one transfer error is the first one: English keeps too the same and just adds not elsewhere, so learners write *minäkin en. Finnish will not let the additive clitic sit next to a negation — it must mutate into -kaan/-kään and the negative verb must be there. Lock the two forms together as one memory: -kin lives in the light, -kaan/-kään lives in the dark.
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Start learning Finnish→Related Topics
- -kin: 'also, too, even'B1 — The additive clitic -kin ('also, too, even') attaches to the word it adds, and — unlike almost every other clitic — never harmonizes.
- The Negative Verb: en, et, ei, emme, ette, eivätA1 — Finnish has no word for 'not' — it negates with a conjugating negative verb (en, et, ei, emme, ette, eivät) plus the main verb's connegative form.
- Negating the Present: en puhuA1 — Combine the negative verb with the connegative to negate the Finnish present — en puhu, ei tule, eivät tiedä — and note that negation forces a partitive object.
- Clitic Particles: An OverviewA2 — An overview of Finnish enclitic particles — -ko/-kö, -kin, -kaan/-kään, -han/-hän, -pa/-pä, -s — how they attach, harmonize, and stack.