A rezsi nagynak tűnik.

In everyday Hungarian, rezsi usually means household running costs, especially things like electricity, gas, water, heating, and similar bills.

Depending on context, it can be translated as:

• utilities
• utility costs
• household bills
• sometimes overhead

So in this sentence, it means something like the utility costs.

A is the Hungarian definite article the.

So:

• a rezsi = the utilities / the utility costs

Hungarian uses a before consonant sounds and az before vowel sounds.

This is one of the most important grammar points in the sentence.

After tűnik meaning seems / appears, Hungarian often uses the adjective in the -nak / -nek form.

So:

• nagy = big, large
• nagynak tűnik = seems big / seems high

This is a normal Hungarian pattern. A native English speaker often expects just the plain adjective, but with tűnik, the -nak/-nek ending is very common.

Here, tűnik means seems or appears.

It is the 3rd person singular present tense form of tűnni.

So:

• A rezsi nagynak tűnik. = The utility costs seem high.

In this sentence, tűnik is the main verb.

Yes, nagy basically means big / large, but Hungarian often uses it in places where English would prefer high.

So with costs, bills, prices, amounts, and similar things:

• Hungarian may use nagy
• English often uses high

That is why A rezsi nagynak tűnik is naturally translated as The utility costs seem high, not big.

Yes. It is completely complete as it is.

You do not need lenni (to be) here, because tűnik already functions as the verb seems.

So:

• A rezsi nagynak tűnik. = complete sentence
• there is no missing verb

Yes.

The given sentence:

• A rezsi nagynak tűnik.

is a normal, neutral word order.

You could also say:

• Nagynak tűnik a rezsi.

That version puts more focus on nagynak and sounds a bit more like:

• The utility costs seem high
• or It’s the highness of the utility costs that stands out

Both are grammatical, but Hungarian word order often reflects emphasis and information structure.

Grammatically, it is treated as singular here.

Even though in English utilities is often plural, Hungarian rezsi is usually a collective noun referring to utility costs as one category.

That is why the verb is singular:

• rezsi ... tűnik not a plural verb form.

You say:

• A rezsi nem tűnik nagynak.

This means:

• The utility costs do not seem high.

Notice:

• nem goes before the verb
• nagynak stays in the same -nak form

Yes, and it is similar, but the nuance is slightly different.

• nagynak tűnik = seems high / seems large
• soknak tűnik = seems like a lot / seems too much

So with bills or costs:

• nagynak tűnik focuses more on size/level
• soknak tűnik focuses more on the idea that the amount feels excessive

Both can work, but they are not exactly identical.