Translative -ksi: 'becoming, into' | Finnish Grammar

If the essive is the case of being in a state, the translative is the case of arriving at one. It marks the end-result of a change — what something turns into, becomes, or is made to be. English carries this with "become", "turn (into)", "make", or a bare adjective after "get" ("get old", "turn cold"); Finnish packs all of it into a single ending, -ksi. The translative is one of the two "marginal" cases that are in fact completely alive in everyday speech — you will use it constantly to talk about becoming, changing, translating, and making.

Change of state: what something becomes

The heart of the translative is transformation. Attach -ksi to the thing that is the destination of a change — the new state at the end of the process:

Isoisä on tullut jo vanhaksi eikä enää aja autoa.

Grandpa has grown old and doesn't drive anymore.

Sää muuttui äkkiä kylmäksi, ja aloimme palella.

The weather suddenly turned cold, and we started to freeze.

Tulin todella iloiseksi, kun kuulin uutisen.

I became really happy when I heard the news.

Maalasin makuuhuoneen seinän valkoiseksi.

I painted the bedroom wall white.

In each case the -ksi noun is where the subject or object ends up: vanhaksi (old), kylmäksi (cold), iloiseksi (happy), valkoiseksi (white). The last example is worth noticing — maalata seinä valkoiseksi literally frames painting as "making the wall into white". Finnish sees causing a result the same way it sees becoming: both point at an end-state, so both take the translative.

Becoming a profession: opiskella lääkäriksi

A special, very common flavor of "change of state" is training or growing into a role. Where the essive names the role you hold, the translative names the role you are heading toward:

Poikani opiskelee lääkäriksi Turun yliopistossa.

My son is studying to become a doctor at the University of Turku.

Hän valmistui insinööriksi viime keväänä.

She qualified as an engineer last spring.

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Here is the state-vs-change split in one line: Hän on opettajana — she is a teacher (essive, the role she holds). Hän opiskelee opettajaksi — she is studying to become one (translative, the role she's moving toward). If your sentence means "become / study to be / turn into", reach for -ksi, not -na.

Naming and languages: sanoa suomeksi

The translative has a second everyday job that has nothing obvious to do with "becoming": it expresses "in" a language — saying, writing, or translating something into Finnish, into English. Think of it as rendering the words into the form of that language:

Miten sanotaan 'kiitos' englanniksi?

How do you say 'thank you' in English?

Käännä tämä lause suomeksi ennen huomista.

Translate this sentence into Finnish before tomorrow.

So "in Finnish" as a language is suomeksi (translative), not suomessa (which would mean "in Finland", the place). This is a neat trap: Suomessa = in the country, suomeksi = in the language.

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The translative works with both the causative and the spontaneous version of a change, and the ending is identical. Muutan varaston taloksi — "I'm converting the warehouse into a house" (I cause it). Varasto muuttui taloksi — "The warehouse turned into a house" (it happened). Whether someone drives the change or it just occurs, the end-result still wears -ksi.

The form: gradates like the genitive, but never harmonizes the vowel

Two mechanical facts, and they pull in opposite directions.

It gradates to the weak grade. Unlike the essive — which keeps the strong grade — the translative behaves like the genitive: it attaches to the inflectional (weak) stem, so k/p/t softens. Lining up the essive against the translative shows the split cleanly:

Word	Essive (strong)	Translative (weak)
käsi (hand)	kätenä	kädeksi (t → d)
tyttö (girl)	tyttönä	tytöksi (tt → t)
leipä (bread)	leipänä	leiväksi (p → v)

But its vowel never changes. The ending is -ksi, and that i is a neutral vowel, so the translative is harmony-invariant — there is no -ksä twin. A front-vowel stem still takes plain -ksi: kylmä → kylmäksi, tyttö → tytöksi, never kylmäksä. This is unusual: most Finnish endings flip between an a and an ä version, but the translative simply refuses to.

Vesi jäätyi yön aikana kovaksi jääksi.

The water froze into hard ice during the night.

The verb that lives with it: tulla

The most typical trigger for the translative is tulla, "to become" — tulla vanhaksi (grow old), tulla iloiseksi (become happy), tulla sairaaksi (fall ill). English speakers, missing a one-word "become", tend to build "come to be old" or "be becoming old"; Finnish just says tulla + translative. The full range of tulla as a change-of-state verb is on the tulla + translative page.

Jos et pukeudu lämpimästi, tulet sairaaksi.

If you don't dress warmly, you'll get sick.

The translative also marks a span of intended time (vuokraan mökin viikoksi, "I'm renting a cottage for a week") and deadlines (jouluksi, "by Christmas") — those "for-a-time" uses are gathered on the translative for deadlines page.

Vuokraan mökin viikoksi heinäkuussa.

I'm renting a cottage for a week in July.

Common Mistakes

❌ Hän opiskelee lääkärinä.

Incorrect — studying to BECOME a doctor is a change, so it needs the translative: lääkäriksi (lääkärinä = working in the role).

✅ Hän opiskelee lääkäriksi.

She's studying to become a doctor.

❌ Sää muuttui kylmäksä.

Incorrect — -ksi is harmony-invariant; there is no *-ksä: kylmäksi.

✅ Sää muuttui kylmäksi.

The weather turned cold.

❌ Vuokraan mökin viikkoksi.

Incorrect — the translative gradates like the genitive: viikko → viikoksi (kk → k).

✅ Vuokraan mökin viikoksi.

I'm renting a cottage for a week.

❌ Miten sanotaan tämä suomessa?

Incorrect — 'in the Finnish language' is suomeksi; suomessa means 'in Finland' (the country).

✅ Miten sanotaan tämä suomeksi?

How do you say this in Finnish?

Key Takeaways

The translative -ksi marks the end-result of a change — what something becomes or is made into: vanhaksi, kylmäksi, valkoiseksi.
It names the role you grow into: opiskella lääkäriksi — contrast the essive lääkärinä (the role you hold).
It expresses "into / in" a language: suomeksi, englanniksi (not suomessa, which is the country).
It gradates to the weak grade like the genitive (kädeksi, tytöksi, leiväksi) — but its vowel is invariant: never -ksä.
Its signature verb is tulla ("to become"): tulla vanhaksi, tulla sairaaksi.

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