A kuka tele van, mert a szemét még nincs kidobva.

Hungarian often uses the definite article a / az more broadly than English does.

• a kuka = the trash can / bin
• a szemét = the trash / rubbish

Even when English might say trash without the, Hungarian often prefers the article if the speaker has a specific, understood thing in mind. In this sentence, both the bin and the trash are treated as known in the situation.

Also, a is used before consonant sounds, while az is used before vowel sounds.

Kuka is a common everyday word meaning trash can, garbage bin, or wheelie bin, depending on context.

A few notes:

• It is a very normal spoken word.
• In some contexts, it can refer to a larger outdoor bin rather than a small indoor wastebasket.
• Other words exist too, such as szemetes or szemetes kuka, but kuka is extremely common.

So here A kuka tele van means something like The bin is full.

In Hungarian, tele means full, but in this construction it normally appears with van:

• tele van = is full
• literally something like is full-filled / is in a full state

So:

• A kuka tele van. = The bin is full.

This is a very common pattern in Hungarian:

• Tele van a szoba füsttel. = The room is full of smoke.
• Tele vagyok munkával. = I’m full of work / I have a lot of work.

English learners often expect a simple adjective + to be, and this is close, but the fixed expression is usually tele van.

A kuka tele van is the normal, neutral word order.

Hungarian word order is flexible, but it is strongly connected to focus and emphasis.

• A kuka tele van = neutral statement: The bin is full.
• A kuka van tele would put stronger focus on the bin, roughly like It’s the bin that is full.

So the version in the sentence is simply the most natural one if you are just describing the situation.

Mert means because.

It introduces the reason:

• A kuka tele van = The bin is full
• mert a szemét még nincs kidobva = because the trash hasn’t been thrown out yet

So the whole sentence gives a cause-and-effect relationship.

Here még means yet.

So:

• még nincs kidobva = has not been thrown out yet

This is a very common use:

• Még nem kész. = It isn’t ready yet.
• Még alszik. = He/She is still sleeping.

Be careful: még can mean either still or yet, depending on context.

In this sentence, because it appears with a negative verb phrase (nincs), the natural English translation is yet.

Hungarian has a special negative form of van in the third person singular and plural:

• van = is
• nincs = is not
• vannak = are
• nincsenek = are not

So you do not say nem van in normal standard Hungarian here.

That is why:

• ki van dobva = it is thrown out / it has been thrown out
• nincs kidobva = it is not thrown out / it has not been thrown out

This is a very common Hungarian result-state construction:

• kidobva is the adverbial participle of kidobni = to throw out
• van / nincs + participle expresses a resulting state

So a szemét még nincs kidobva literally means something like:

• the trash is not in a thrown-out state yet

In natural English, that becomes:

• the trash hasn’t been thrown out yet

This structure is often used where English uses a passive or a present perfect passive.

Similar examples:

• Az ajtó be van csukva. = The door is closed / has been closed.
• A levél meg van írva. = The letter is written / has been written.

The prefix ki- adds the idea of out.

• dobni = to throw
• kidobni = to throw out

So:

• dobva would just relate to thrown
• kidobva specifically means thrown out

Since the sentence is about taking out the trash, ki- is essential.

Hungarian verb prefixes often add meanings like:

• be- = in
• ki- = out
• le- = down
• fel- = up
• el- = away

These prefixes are very important in everyday Hungarian.

In Hungarian, szemét is also commonly used as a mass noun, much like trash, garbage, or rubbish in English.

So a szemét here means:

• the trash
• the rubbish
• the garbage

It does not need to be plural. Hungarian often uses singular mass nouns in exactly this way.

One important extra note: szemét can also be used figuratively as an insult, meaning something like jerk or scumbag, but in this sentence it simply means trash.

Yes. This sentence is very natural, but there are other possible ways to express a similar idea.

For example:

• A kuka tele van, mert még nem dobták ki a szemetet.
  • literally: The bin is full because they haven’t thrown out the trash yet.

This version uses a normal finite verb phrase instead of the nincs kidobva structure.

The original sentence, however, is very idiomatic and efficient. It focuses on the state of the trash: it is not thrown out yet.

It is neutral, everyday Hungarian.

• kuka is common spoken vocabulary
• the grammar is standard
• the sentence sounds natural in daily conversation

So this is exactly the kind of sentence a learner might hear or use in ordinary life.