Jos ilma on kostea, pyykki kuivuu hitaasti ulkona.

If the air is humid, the laundry dries slowly outside.

Breakdown of Jos ilma on kostea, pyykki kuivuu hitaasti ulkona.

• olla: to be
• ulkona: outside
• kuivua: to dry
• ilma: the air
• jos: if
• hitaasti: slowly
• pyykki: the laundry
• kostea: humid

Questions & Answers about Jos ilma on kostea, pyykki kuivuu hitaasti ulkona.

Why does the sentence start with jos?

Jos means if. It introduces a condition.

So the sentence has this basic structure:

• Jos ilma on kostea = the condition
• pyykki kuivuu hitaasti ulkona = the result

Finnish can also put the clauses in the other order:

• Pyykki kuivuu hitaasti ulkona, jos ilma on kostea.

Both are correct.

Why is there a comma in the sentence?

In Finnish, a subordinate clause introduced by jos is normally separated from the main clause with a comma.

So:

• Jos ilma on kostea, pyykki kuivuu hitaasti ulkona.

And if the jos clause comes second, there is still a comma:

• Pyykki kuivuu hitaasti ulkona, jos ilma on kostea.

This is more regular in Finnish than in English.

What does ilma mean here? Is it air or weather?

Ilma literally means air, but in weather-related contexts it can also refer to the atmospheric conditions.

In this sentence, ilma on kostea is most naturally understood as the air is humid/damp. That is why the laundry dries slowly.

A related word is sää, which means weather more generally.
So:

• ilma = air, atmosphere, conditions in the air
• sää = weather in general

Here ilma is a natural choice because humidity is a quality of the air.

Why is it ilma on kostea and not just ilma kostea?

Because Finnish normally needs the verb olla (to be) in this kind of sentence.

So:

• ilma on kostea = the air is humid

Leaving out on would sound incomplete or nonstandard in normal Finnish.

This is different from English in some very informal styles, where people might sometimes drop is, but standard Finnish does not do that here.

Why is kostea in this form?

Kostea is an adjective meaning humid, damp, or moist.

Here it is a predicate adjective after on, and it matches the singular subject ilma.

So:

• ilma = singular
• kostea = singular basic form

Compare:

• Ilma on kostea. = The air is humid.
• Vaatteet ovat kosteita. = The clothes are damp.

In the second example, the subject is plural, so the adjective becomes plural too: kosteita.

What exactly does pyykki mean?

Pyykki usually means laundry.

It is often a collective noun, so even though it refers to many items of clothing or fabric, it is grammatically singular in Finnish.

That is why the verb is singular too:

• pyykki kuivuu = the laundry dries

If you used vaatteet (clothes) instead, the verb would be plural:

• Vaatteet kuivuvat. = The clothes dry / are drying.

Why is the verb kuivuu? What form is that?

Kuivuu is the third-person singular present tense of kuivua, which means to dry, to become dry.

Conjugation:

• minä kuivun = I dry / am drying
• sinä kuivut = you dry / are drying
• hän/se kuivuu = he/she/it dries / is drying

Here the subject is pyykki, which is singular, so the verb is kuivuu.

What is the difference between kuivua and kuivata?

This is a very common and important distinction.

• kuivua = to dry, to become dry
• kuivata = to dry something, to make something dry

So:

• Pyykki kuivuu. = The laundry dries / is drying.
• Minä kuivatan pyykin. = I dry the laundry.

In your sentence, the laundry is undergoing the process itself, so kuivuu is the correct verb.

Does kuivuu mean dries or is drying?

It can mean either, depending on context.

Finnish present tense often covers both:

• a general truth: dries
• an ongoing process: is drying

In this sentence, it describes a general fact or usual result, so English often translates it as dries slowly.

Finnish does not need a separate continuous form like English is drying.

Why is it hitaasti and not hidas?

Because hitaasti is an adverb, and it modifies the verb kuivuu.

• hidas = slow (adjective)
• hitaasti = slowly (adverb)

So:

• hidas pyykki would not make sense here
• pyykki kuivuu hitaasti = the laundry dries slowly

A very common Finnish pattern is:

• adjective + -sti → adverb

For example:

• nopea → nopeasti = quickly
• hidas → hitaasti = slowly

What does ulkona mean, and why not ulos?

Ulkona means outside, outdoors, in the sense of location.

Here the laundry is already outside, so Finnish uses the location form:

• ulkona = outside, outdoors

Compare:

• ulos = out / to outside, showing movement toward outside
• ulkoa = from outside

So:

• Pyykki on ulkona. = The laundry is outside.
• Vien pyykin ulos. = I take the laundry outside.
• Tuon pyykin ulkoa. = I bring the laundry in from outside.

In your sentence there is no movement, only location, so ulkona is correct.

Why is there no future tense? In English we might say will dry slowly.

Finnish usually does not have a separate future tense. The present tense is used for:

• present situations
• general truths
• future situations, when the context makes them clear

So pyykki kuivuu hitaasti can mean:

• the laundry dries slowly
• the laundry will dry slowly

In a sentence with jos, Finnish still normally uses the present tense for both parts when stating a general condition and result.

Can the word order change?

Yes, Finnish word order is fairly flexible.

The neutral version here is:

• Jos ilma on kostea, pyykki kuivuu hitaasti ulkona.

But other orders are possible depending on emphasis, for example:

• Pyykki kuivuu hitaasti ulkona, jos ilma on kostea.
• Pyykki kuivuu ulkona hitaasti, jos ilma on kostea.

The meaning stays very similar, but the emphasis can shift slightly. Finnish often uses word order to highlight what is new, important, or contrasted.

Why use kuivuu instead of on kuiva?

Because kuivuu describes a process, while on kuiva describes a state.

• pyykki kuivuu = the laundry is drying / becomes dry
• pyykki on kuiva = the laundry is dry

Your sentence talks about how fast the drying happens, so the process verb kuivuu is the right choice.