La vifio funkcias en ĉiu ĉambro.

La is the Esperanto definite article, meaning the.

So La vifio means the Wi-Fi: the specific Wi-Fi being talked about, such as the hotel’s Wi-Fi or the Wi-Fi in this building.

Yes, Vifio funkcias en ĉiu ĉambro could also be possible in some contexts. Without la, it sounds more general or less tied to a previously identified Wi-Fi. Esperanto uses la when the speaker assumes the listener knows which thing is meant.

A useful reminder for English speakers: Esperanto has la for the, but it has no separate word for a/an.

Vifio is an Esperanto-style adapted form of Wi-Fi. Esperanto often adapts borrowed words so they fit normal spelling and pronunciation patterns.

You may also see Wi-Fi written as-is, especially in informal or international contexts. But vifio is easier to pronounce in a regular Esperanto way and behaves like an ordinary Esperanto noun:

• vifio = Wi-Fi
• it ends in -o, the normal noun ending

So the sentence is showing a fully Esperanto-shaped version of the word.

Yes. Funkcii means to function, to work, or to operate.

So La vifio funkcias means The Wi-Fi works or The Wi-Fi is functioning.

This is very natural in Esperanto. Just like in English, you can use work for things like internet, Wi-Fi, machines, phones, and systems.

In Esperanto, all present-tense verbs end in -as.

So:

• funkcii = to function
• funkcias = functions / is functioning / works

One nice feature for English speakers: the verb does not change for different subjects.

So you get:

• mi funkcias
• vi funkcias
• ĝi funkcias
• ili funkcias

The ending stays -as every time.

Both are possible, but they are slightly different in feel.

• en ĉiu ĉambro = in every room / in each room
• en ĉiuj ĉambroj = in all rooms

Ĉiu focuses on each individual room one by one.
Ĉiuj focuses on the whole group.

In many real situations, the meaning is very close, and either could work. But en ĉiu ĉambro is a very natural way to say in every room.

Because ĉiu means each or every, and it normally goes with a singular noun.

So:

• ĉiu ĉambro = each room / every room
• ĉiuj ĉambroj = all the rooms

This is similar to English, where we say every room, not every rooms.

Because en here shows location, not movement.

• en ĉiu ĉambro = in every room

There is no accusative -n because the Wi-Fi is not moving into the rooms; it is simply functioning there.

A very important Esperanto pattern is:

• en la ĉambro = in the room
• en la ĉambron = into the room

So the -n can appear after en when there is direction or motion into something. Here there is only place, so ĉambro stays without -n.

It can mean both each and every, depending on context.

In this sentence, ĉiu ĉambro can be understood as either:

• each room
• every room

English often uses those two words a little differently in style, but Esperanto ĉiu covers both ideas very naturally.

The letter ĉ is pronounced like ch in church.

So:

• ĉiu sounds roughly like CHEE-oo
• ĉambro sounds roughly like CHAM-bro

A few more pronunciation notes from the sentence:

• vifio ≈ vee-FEE-o
• funkcias ≈ foonk-TSEE-as

Also, Esperanto stress normally falls on the second-to-last syllable:

• viFIo
• funkCIas
• ĈIu
• ĈAMbro

Yes. Esperanto word order is fairly flexible because the grammar endings do a lot of the work.

The original sentence has a neutral, straightforward order:

• La vifio funkcias en ĉiu ĉambro.

But you could also say:

• En ĉiu ĉambro la vifio funkcias.

That version puts more emphasis on in every room.

Even so, the original order is probably the most neutral and natural choice for a beginner to learn first.