Router má připojení k internetu.

A very literal breakdown is:

• Router = router
• má = has
• připojení = connection
• k = to
• internetu = the internet

So literally, it is The router has a connection to the internet.

In natural English, you would usually say The router has an internet connection.

Má is the 3rd person singular present form of mít, which means to have.

Because router is a singular subject, Czech uses má = has.

So:

• já mám = I have
• ty máš = you have
• on/ona/ono má = he/she/it has

Here, router is treated as it, so má is the correct form.

Připojení is a noun, and here it means connection.

It comes from the verb připojit (se), meaning to connect.

In technical contexts, připojení often means things like:

• a network connection
• an internet connection
• being connected

So má připojení k internetu means the router has internet connectivity / has a connection to the internet.

Because the preposition k requires the dative case.

The basic noun is internet, but after k, it changes form:

• internet = nominative
• k internetu = to the internet

This pattern is normal in Czech: prepositions often force the following noun into a specific case.

So připojení k internetu is the standard structure for connection to the internet.

It is dative singular.

That is because k always takes the dative.

A useful thing to know is that for some Czech nouns, the genitive and dative forms can look the same. That is the case here: internetu can be both genitive and dative, but after k, it is definitely dative.

Because Czech has no articles.

English needs words like a, an, and the, but Czech normally does not use anything equivalent.

So:

• Router can mean a router or the router
• připojení can mean a connection or the connection

The exact meaning depends on context.

Yes, absolutely.

That sentence means The router is connected to the internet.

The difference is:

• Router má připojení k internetu = The router has an internet connection
• Router je připojený k internetu = The router is connected to the internet

They are very close in meaning, but the first focuses more on having a connection, while the second focuses more on the router’s state.

The given word order is the most neutral and natural one:

Router má připojení k internetu.

Czech word order is more flexible than English, because the grammar is shown by endings more than by position. But different word orders can sound more marked or emphasize different parts of the sentence.

So this version is the best basic one for a learner.

The stress is on the first syllable, as usual in Czech:

PŘI-po-je-ní

A rough learner-friendly approximation is:

przhi-po-yeh-nee

The hardest part is ř, which has no exact English equivalent. It sounds a bit like an r and zh sound combined.

Also, the final í is long, so the last syllable is held a little longer:

• ní = long nee

Yes. Even though router is a borrowed word, Czech treats it like a normal noun.

It is usually treated as masculine inanimate.

That means it can decline, for example:

• router = nominative
• routeru = genitive/dative
• routerem = instrumental
• routery = plural

So although it looks English, it behaves grammatically like a Czech noun once it is in the sentence.