Ebben a megyében lakunk.

Because Hungarian normally uses the pattern demonstrative + definite article + noun:

• ez a megye = this county
• ebben a megyében = in this county

So the a here is the definite article, like English the, not the indefinite article a/an.

Also, Hungarian has two forms of the definite article:

• a before a consonant
• az before a vowel

Since megye starts with m, the article is a.

This is a very common Hungarian pattern. The demonstrative agrees with the noun in case.

So if the noun is in the -ban/-ben form, the demonstrative must be too:

• ez a ház = this house
• ebben a házban = in this house

Likewise:

• ez a megye = this county
• ebben a megyében = in this county

To an English speaker, this can look like the meaning in is being said twice, but in Hungarian it is just normal grammatical agreement.

-ban/-ben is the inessive case, which usually means in or inside.

So:

• megye = county
• megyében = in the county

Why -ben and not -ban? Because of vowel harmony.

Very roughly:

• words with back vowels usually take -ban
• words with front vowels usually take -ben

megye has front vowels, so it takes -ben.

ebben is the case-marked form of ez.

Historically and grammatically, it is:

• ez
  • -ben → ebben

The z changes because it assimilates to the following consonant, which is why you see bb.

The same thing happens in other common forms:

• az
  • -ban → abban
• ez
  • -ből → ebből
• az
  • -ból → abból

So ebben is not a completely separate word you just have to memorize; it is the expected form of ez with this ending.

Because Hungarian nouns ending in -a or -e usually lengthen that final vowel before many suffixes.

So:

• megye → megyében
• szoba → szobában
• kefe → kefében

That means the final e of megye becomes é when the ending is added.

Megye usually means county, an administrative region.

In Hungarian context, a megye is a larger area containing towns and villages. So it is not:

• a city
• a district
• a country

The usual English translation is county, although administrative systems are never perfectly identical across countries.

Because Hungarian verbs already show the subject in their endings.

In lakunk, the ending -unk tells you the subject is we. So a separate pronoun like mi is usually unnecessary.

Hungarian often leaves subject pronouns out unless they are needed for emphasis or contrast.

So:

• lakunk = we live

And if you did say mi, it would usually add emphasis:

• Mi lakunk ebben a megyében. = We are the ones who live in this county.

Lakunk is the present-tense 1st person plural form of lakni = to live, to reside.

Breakdown:

• lak- = verb stem
• -unk = we

So lakunk means we live.

This verb is being used in the sense of reside/live somewhere, which is why it fits naturally with a place expression like ebben a megyében.

Yes. Hungarian word order is much more flexible than English word order.

Ebben a megyében lakunk is perfectly natural, and it puts the location first as the topic or setting.

You could also say:

• Lakunk ebben a megyében.

That is also grammatical, but it feels a little different in information structure.

A useful way to think about it is:

• sentence-initial Ebben a megyében = as for this county / in this county
• the sentence is framed around the location

Hungarian word order often reflects topic, focus, and emphasis, not just subject-verb-object order.

Gy is a single Hungarian consonant, not a separate g plus y.

For English speakers, a rough approximation is a soft dy sound, though it is not exactly the same as any normal English sound.

So megye is approximately like:

• MEH-dye

And megyében is approximately:

• MEH-dyé-ben

A few helpful notes:

• gy is much softer than English g
• é is a long vowel, somewhat like the vowel in say, but cleaner and tenser
• the stress in Hungarian is always on the first syllable, so: ME-gyé-ben