Megvarratjuk az alkalmi ruhát.

It is a causative verb form. The basic idea is not we sew it, but we have it sewn / we get it made.

Breakdown:

• varr = to sew
• varrat = to have something sewn, to make someone sew something
• megvarratjuk = we have it sewn / we’ll get it sewn

So the sentence means something like:

• We’ll have the dress made.
• We’ll get the dress sewn.

Depending on context, it can refer to having a dressmaker do it, not necessarily doing the sewing ourselves.

Because these two verbs mean different things:

• megvarrjuk = we sew it / we will sew it
• megvarratjuk = we have it sewn / we make someone sew it

The extra -at- is what creates the causative meaning.

So:

• megvarrjuk a ruhát = we sew the dress ourselves
• megvarratjuk a ruhát = we get the dress sewn by someone else

This is a very important distinction in Hungarian.

The prefix meg- often makes the action feel completed, successful, or brought to an end.

Compare:

• varr = sew
• megvarr = sew up, finish sewing, sew completely

Then with the causative:

• varratjuk = we have it sewn
• megvarratjuk = we have it sewn completely / we get it made

In many cases, meg- is best understood as showing a finished result rather than translated with a separate English word.

Because the verb is in the definite conjugation.

Hungarian uses two main conjugations:

• indefinite
• definite

You use the definite conjugation when the verb has a specific direct object.

Here the object is:

• az alkalmi ruhát = the occasion dress / the formal dress

That is a definite, specific thing, so the verb takes the definite ending:

• megvarratjuk

The -juk part shows:

• we
• with a definite object

Because ruhát is in the accusative case, which marks the direct object of the verb.

• ruha = dress, clothing item
• ruhát = the dress (as the thing being acted on)

In this sentence, the dress is what is being had sewn, so it needs the accusative ending.

The -t is the usual accusative marker, though sometimes a linking vowel appears before it, as here:

• ruha → ruhá-t

Alkalmi ruha means an occasion dress, formal dress, or dress for a special occasion.

The adjective alkalmi comes from alkalom, meaning occasion.

So:

• alkalmi = for an occasion, occasion-related, dressy, formal depending on context
• alkalmi ruha = a dress worn for a special event

A very natural English translation is often simply:

• formal dress
• special-occasion dress

Hungarian has two forms of the:

• a
• az

The choice depends on the following sound:

• a before a consonant
• az before a vowel

Since alkalmi begins with a vowel, Hungarian uses:

• az alkalmi ruhát

Compare:

• a ruha = the dress
• az alkalmi ruha = the occasion dress

Grammatically, megvarratjuk is in the present tense, but Hungarian very often uses the present tense to talk about the future when the context makes it clear.

So this can mean:

• We are having the dress made
• We’ll have the dress made

Both are possible depending on the situation.

If the meaning shown to the learner is future, that is perfectly normal.

Yes. Hungarian word order is flexible and often reflects focus or emphasis.

The neutral sentence is:

• Megvarratjuk az alkalmi ruhát.

This is a natural way to say We’ll have the occasion dress made.

But other word orders are possible, for example:

• Az alkalmi ruhát megvarratjuk.

This puts more emphasis on the occasion dress.

So word order in Hungarian is not as fixed as in English. It often tells you what is most important, contrasted, or already known.

The basic verb is:

• varr = sew

When suffixes are added, Hungarian spelling and pronunciation can change a little to make the word easier to say.

With the causative formation, you get:

• varr
  • causative element → varrat

So the resulting form is written:

• varratjuk

This is a normal type of change in Hungarian verb formation. The important thing for learners is to recognize:

• varr = sew
• varrat = have sewn / make sew

In practice, it usually means we have the dress made.

The causative in Hungarian can cover both ideas:

• making someone do something
• arranging for something to be done

With a sentence like this, the most natural interpretation is that we are having a dressmaker sew it for us.

So although the grammar comes from a causative structure, the best English translation is usually:

• We’ll have the dress made.
• We’re getting the dress made.