Szigeteljük a nyílászárót.

Hungarian often leaves subject pronouns unstated, because the verb ending already tells you who is doing the action.

In szigeteljük, the ending -jük shows first person plural, so we is already built into the verb.

You would only add mi if you wanted extra emphasis:

• Mi szigeteljük a nyílászárót. = We are insulating the door/window unit.

It comes from the verb szigetel, which means to insulate.

So:

• szigetel- = the verb stem
• -jük = a verb ending meaning roughly we ... it/them in this form

So szigeteljük can mean:

• we insulate it
• or, depending on context, let's insulate it

Because Hungarian has two main verb conjugation patterns:

• indefinite conjugation: used when there is no specific direct object, or the object is indefinite
• definite conjugation: used when the direct object is specific/definite

Here the object is a nyílászárót = the door/window unit, so it is definite. That is why the verb uses the definite ending -jük.

Compare:

• Szigetelünk egy nyílászárót. = We are insulating a door/window unit.
• Szigeteljük a nyílászárót. = We are insulating the door/window unit.

Yes. In this form, it can be ambiguous.

szigeteljük can be:

• present indicative: we insulate it / we are insulating it
• 1st person plural imperative/jussive: let's insulate it

Usually the context, tone, or punctuation tells you which meaning is intended.

For example:

• neutral statement: Szigeteljük a nyílászárót.
• suggestion/command: Szigeteljük a nyílászárót!

The -t is the accusative ending. It marks the direct object of the sentence: the thing being insulated.

So:

• nyílászáró = door/window unit, joinery element
• nyílászárót = the door/window unit, as a direct object

Because the noun already ends in a vowel, Hungarian just adds -t directly here.

It is a technical/building word. It usually refers to a door or window unit, often including the frame and closing/opening structure.

Depending on context, English translations can vary:

• window/door unit
• joinery element
• door or window
• sometimes more broadly doors and windows

It is not a very literal everyday word in English, so the best translation depends on the situation.

Hungarian has two forms of the:

• a before a consonant sound
• az before a vowel sound

nyílászáró begins with ny, which is a consonant sound, so the correct article is a.

Examples:

• a nyílászáró
• az ablak

Yes, it could be plural, but singular is normal if you mean:

• one specific unit
• or the category in a general/technical sense

If you meant several actual items, you would use the plural:

• nyílászárókat = door/window units, as a direct object

So:

• Szigeteljük a nyílászárót. = We insulate / Let’s insulate the door/window unit.
• Szigeteljük a nyílászárókat. = We insulate / Let’s insulate the door/window units.

This is a very normal Hungarian word order: verb + object.

• Szigeteljük a nyílászárót.

Hungarian word order is flexible, though, and changing it often changes the emphasis.

For example:

• Szigeteljük a nyílászárót. = neutral
• A nyílászárót szigeteljük. = emphasis on the door/window unit
• Mi szigeteljük a nyílászárót. = emphasis on we

So the sentence is grammatically straightforward, but word order can shift for focus.

A rough pronunciation guide:

• sz sounds like English s
• ny sounds like the ny in canyon or Spanish ñ
• j sounds like English y
• ü is like German ü or French u; English does not have an exact equivalent

Approximate pronunciation:

• szigeteljük ≈ SEE-gheh-tehl-yük
• a nyílászárót ≈ aw NYEE-laa-saa-root

More precisely:

• szigeteljük = [ˈsiɡɛtɛljyk]
• a nyílászárót = [ɒ ˈɲiːlaːsaːroːt]

Also note:

• Hungarian spelling is very regular
• stress usually falls on the first syllable of each word