Voimme tehostaa ilmanvaihtoa.

Voimme means we can.

It comes from the verb voida, which means to be able to / can.

In this sentence, voimme is:

• present tense
• 1st person plural
• so: we can

The ending -mme is the normal Finnish ending for we on a verb.

So very roughly:

• voida = to be able to
• voimme = we are able to / we can

Finnish often leaves out subject pronouns when they are already clear from the verb ending.

So:

• voimme already means we can
• adding me would be possible, but not necessary

You could say:

• Me voimme tehostaa ilmanvaihtoa.

But that usually adds emphasis, something like:

• We can improve the ventilation.

Without me, the sentence is more neutral and natural in many contexts.

Because Finnish uses the infinitive directly after modal verbs such as voida.

In English, we say:

• we can improve

not we can to improve

Finnish works similarly here:

• voimme tehostaa

So after voida (can / be able to), the next verb usually appears in the basic infinitive form.

Tehostaa is the basic dictionary form of the verb, often called the first infinitive.

Its meaning is something like:

• to improve
• to enhance
• to make more efficient
• to intensify

In this sentence, after voimme, it stays in that infinitive form:

• voimme tehostaa = we can improve / enhance

A useful thing to notice is that Finnish often uses one verb where English might choose different words depending on context. So tehostaa can sound like improve, boost, optimize, or make more effective.

Because ilmanvaihtoa is in the partitive singular.

The basic form is:

• ilmanvaihto = ventilation

In this sentence it becomes:

• ilmanvaihtoa

This is very common for objects in Finnish when the action is seen as:

• ongoing,
• not presented as a fully completed whole,
• or referring to something general or uncountable.

Here, ventilation is being talked about in a general sense, so the partitive sounds natural:

• Voimme tehostaa ilmanvaihtoa.
• We can improve the ventilation / ventilation.

If you used a total object form instead, the meaning would shift toward improving a specific whole thing to completion. In many everyday contexts, ilmanvaihtoa is the expected choice.

The partitive is one of the most important Finnish cases, and English speakers often ask about it.

In this sentence, it helps show that the object is not being treated as a completely finished, bounded result. Instead, the sentence presents the action more generally:

• improve ventilation
• not necessarily finish improving the entire ventilation system

So ilmanvaihtoa suggests something like:

• improving ventilation in general,
• increasing ventilation,
• making the ventilation better/more effective

This is especially natural with things that feel like:

• a substance,
• an activity,
• a general process,
• or something uncountable.

Since ventilation behaves a lot like an uncountable idea here, the partitive makes good sense.

Yes, it is a compound word.

It is made from:

• ilma = air
• vaihto = exchange / change

So ilmanvaihto literally means something like air exchange, which is a very transparent way to express ventilation.

Finnish uses compound words very often, much more freely than English does. So seeing a long noun like this is completely normal.

Finnish does not have articles like a, an, or the.

So:

• ilmanvaihto can mean ventilation
• ilmanvaihtoa can mean ventilation, the ventilation, or sometimes just part of that idea depending on context

English has to choose between:

• a
• the
• no article

Finnish usually leaves that to context.

That means this sentence could be translated in slightly different ways depending on the situation, for example:

• We can improve ventilation.
• We can improve the ventilation.

Both can be valid.

Yes. Finnish word order is fairly flexible, though not random.

The neutral order here is:

• Voimme tehostaa ilmanvaihtoa.

But you could move things around for emphasis. For example:

• Ilmanvaihtoa voimme tehostaa.

That puts more focus on ventilation.

Or:

• Tehostaa voimme ilmanvaihtoa, though this is much less neutral and would usually need a special context.

So the basic sentence order is the most natural for a learner to remember, but Finnish can rearrange words more easily than English because case endings carry a lot of the grammatical information.

Yes, tehostaa is a common and useful verb, especially in practical, technical, administrative, and formal contexts.

It often suggests:

• making something more efficient,
• boosting effectiveness,
• intensifying performance,
• optimizing a process

So compared with a general English verb like improve, tehostaa can sound a bit more specific or functional.

For example, it often appears with things like:

• production
• security
• monitoring
• cooperation
• ventilation

So in this sentence, it does not just mean make better in a vague way; it has a sense of making the ventilation work more effectively.

Sometimes yes, but the nuance changes.

• parantaa = to improve, make better
• tehostaa = to make more efficient / intensify / boost effectiveness

So:

• Voimme parantaa ilmanvaihtoa = We can improve the ventilation.
• Voimme tehostaa ilmanvaihtoa = We can enhance / increase / optimize the ventilation.

With ilmanvaihto, tehostaa often sounds especially natural if the idea is increasing airflow or making the system work more effectively.

So the verbs are related, but not always interchangeable in tone.