Tuntuu kuin dreija pyörisi liian nopeasti.

Finnish often leaves out the kind of dummy subject that English needs.

• Tuntuu is the 3rd person singular present of tuntua.
• In sentences like this, Finnish uses it impersonally: Tuntuu... = It feels/seems...

So there is no separate word for English it here. Finnish does not need one.

It is somewhere between feels and seems.

With tuntua, Finnish often expresses a personal impression rather than a hard factual statement. In this sentence, the speaker is not necessarily saying that the wheel truly is spinning too fast, only that it gives that impression.

So tuntuu here works like:

• it feels as if...
• it seems like...

Kuin means as if or like/as though in this kind of structure.

It introduces the situation that the speaker is comparing reality to:

• Tuntuu kuin... = It feels as if...

So the sentence is built as:

• Tuntuu = it feels/seems
• kuin dreija pyörisi liian nopeasti = as if the wheel were spinning too fast

Because Finnish often uses the conditional after kuin in this kind of as if sentence.

• pyörii = spins / is spinning
• pyörisi = would spin / were spinning

Here, the conditional does not mainly mean future or politeness. It marks the idea as an impression, appearance, or non-confirmed situation. English often does something similar with as if it were spinning.

So pyörisi helps convey:

• this is how it seems
• the speaker is not flatly stating it as a fact

It comes from the verb pyöriä, meaning to spin / rotate.

In this sentence, pyörisi is:

• 3rd person singular
• conditional

A useful way to think of it is:

• dictionary form: pyöriä
• present: pyörii
• conditional: pyörisi

You will see the same pattern in other verbs too:

• mennä → menisi
• tehdä → tekisi
• istua → istuisi

Here dreija is the subject of the kuin clause, so the basic nominative singular form is exactly what you would expect.

In dreija pyörisi:

• dreija = the wheel
• pyörisi = would spin / were spinning

So dreija is simply the thing doing the action.

Because the sentence needs an adverb, not an adjective.

• nopea = fast
• nopeasti = quickly / fast

The word is describing how it spins, not describing the wheel itself.

So:

• nopea dreija would mean a fast wheel
• pyörisi nopeasti means would spin quickly

And liian nopeasti means too quickly / too fast.

Yes. That is a very natural alternative, but the nuance is a little different.

• Tuntuu, että dreija pyörii liian nopeasti = it seems/feels that the wheel is spinning too fast
• Tuntuu kuin dreija pyörisi liian nopeasti = it feels as if the wheel were spinning too fast

The että + indicative version is more straightforward and matter-of-fact.

The kuin + conditional version is more impression-based and slightly more tentative, like as if in English.

Good question. Siltä is often used, and many learners first meet the pattern as:

• Tuntuu siltä kuin... = it feels as if...

But Finnish can also leave siltä out, especially in a more compact sentence:

• Tuntuu kuin dreija pyörisi liian nopeasti

Both are understandable. The version with siltä can sound a bit fuller or more explicitly idiomatic, while the version without it is shorter.

In standard written Finnish, you will often see a comma before a finite subordinate clause, so many writers would write:

• Tuntuu, kuin dreija pyörisi liian nopeasti.

That said, learners will also encounter punctuation variation, especially in informal writing. The important grammar point is that kuin dreija pyörisi liian nopeasti is the clause attached to tuntuu.

The given word order is the most neutral and natural one.

• Tuntuu kuin dreija pyörisi liian nopeasti.

Inside the kuin clause, the subject dreija comes before the verb pyörisi, which is the normal order. The adverbial liian nopeasti comes last, where it naturally gives the key detail.

You can change Finnish word order for emphasis, but in this sentence the original order is the best default choice for a learner.