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Portaikko näyttää puhtaalta.

Portaikko näyttää puhtaalta.
The staircase looks clean.
FromLesson 17inHardcore Finnish
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Breakdown of Portaikko näyttää puhtaalta.

puhdas
clean
näyttää
to look
portaikko
the staircase
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Questions & Answers about Portaikko näyttää puhtaalta.

Why is Portaikko in the nominative case here and not marked in some other way?
Portaikko is the subject of the sentence (“the staircase” that “looks” a certain way). In Finnish, the subject of a clause is in the nominative case. There is no article (“a/the”) in Finnish, so Portaikko simply stands for “a staircase” or “the staircase,” depending on context.
Why is the adjective puhtaalta used instead of the base form puhdas?
In Finnish, when you say something “looks/appears” a certain way with näyttää, the adjective complement must be in the so-called -lta (adessive of resemblance) case. You cannot say Portaikko näyttää puhdas; you need Portaikko näyttää puhtaalta to mean “The staircase looks clean.”
How exactly is puhtaalta formed from puhdas?
  1. Start with the adjective stem puhda- (the -s drops before a consonant).
  2. Add the -lta ending: puhda + lta → puhdal(t)a.
  3. Apply Finnish consonant assimilation and vowel lengthening:
    • d
      • l → t
        • l
    • The preceding vowel a lengthens to aa
      Result: puhtaalta.
What is the literal meaning or function of the -lta case here?
This -lta ending is often called the “adessive of resemblance” (or simply the “-lta case”). It expresses appearance or resemblance, equivalent to English “like” or “as if.” So puhtaalta literally conveys “as if (it is) clean.”
Can I change the word order and say Puhtaalta näyttää portaikko?

Yes. Finnish has fairly free word order for emphasis.
– Portaikko näyttää puhtaalta. (Neutral)
– Puhtaalta näyttää portaikko. (Emphasizes how it looks—“Clean, that staircase looks.”)

How would you make this sentence negative?

Negate näyttää with ei, and the complement stays in -lta:
Portaikko ei näytä puhtaalta.
“That staircase does not look clean.”

How do you say the same thing if there are multiple stairs?

Use the plural forms for subject, verb, and the -lta adjective:
Portaat näyttävät puhtailta.
“(The) stairs look clean.”

Could I also say Portaikko näyttää olevan puhdas?

Yes. That’s another way to express “The staircase seems to be clean.” Here you use the -kse infinitive of olla (to be):
näyttää + olevan + adjective → “appears to be …”
It’s slightly more formal or explicit.

When näyttää means “to show” (as in “show someone something”), does it still take -lta?

No. That’s a different (transitive) meaning of näyttää (“to display, to show”). In that sense you use a direct object in the accusative (or partitive), e.g.
Näytä minulle valokuva. (“Show me the photo.”)
Here there is no -lta on the object.