Chci rezervovat společenskou místnost.

Chci means I want.

Its dictionary form is chtít = to want.
Chci is the 1st person singular present tense form, so it literally means I want.

A few forms of chtít are:

• chci = I want
• chceš = you want
• chce = he/she/it wants

So in this sentence, chci rezervovat... is I want to reserve...

Because after chci (I want), Czech normally uses the infinitive of the second verb.

So:

• chci rezervovat = I want to reserve
• chci jít = I want to go
• chci koupit = I want to buy

This works much like English want to + verb.

Because the phrase is the direct object of rezervovat, so it has to be in the accusative case.

The basic form is:

• společenská místnost = nominative

But after a verb like rezervovat (to reserve), it changes to the accusative:

• společenskou místnost = accusative

This is especially visible because místnost is a feminine noun, and the adjective must agree with it.

So:

• nominative: společenská místnost
• accusative: společenskou místnost

Místnost means room in the sense of an interior space in a building.

It is often a more neutral or formal word than pokoj.

Very roughly:

• místnost = room, помещение/interior room, general/formal
• pokoj = room, often a bedroom or living room, common everyday word

In a phrase like společenská místnost, místnost is the natural word, because it refers to a designated room such as a common room, function room, or social room.

It refers to a common room, function room, social room, or lounge/common area, depending on context.

The adjective společenský / společenská / společenské often relates to:

• social
• communal
• for gatherings
• for events or shared use

So společenská místnost is not just any room. It usually means a room used for meetings, events, socializing, or shared activities.

Místnost is feminine.

That matters because in Czech:

1. adjectives must agree with nouns in gender
2. they also agree in case and number

So:

• nominative singular: společenská místnost
• accusative singular: společenskou místnost

The adjective changes because it has to match místnost.

Chci rezervovat... is understandable and natural, but it can sound a bit direct, especially in service situations.

A more polite option is:

• Chtěl bych rezervovat společenskou místnost. = if spoken by a man
• Chtěla bych rezervovat společenskou místnost. = if spoken by a woman

This literally looks like I would like to reserve..., and it is often more polite in Czech.

You could also say:

• Rád bych rezervoval společenskou místnost. / Ráda bych rezervovala...

That is also polite and common.

Yes, absolutely.

Adding si often makes the action sound more like reserve for oneself. In many everyday situations, Czech speakers do use rezervovat si.

So both are possible:

• Chci rezervovat společenskou místnost.
• Chci si rezervovat společenskou místnost.

The version with si can sound a bit more natural in some contexts, but the sentence without si is still correct.

No, Czech word order is fairly flexible because the case endings show the grammatical role.

The neutral order is:

• Chci rezervovat společenskou místnost.

But you may also hear variations like:

• Společenskou místnost chci rezervovat.
• Rezervovat chci společenskou místnost.

These are grammatically possible, but they shift emphasis.

For a learner, the most neutral and safest version is:

• Chci rezervovat společenskou místnost.

Because Czech has no articles like English a/an/the.

So společenskou místnost can mean:

• a common room
• the common room

The exact meaning depends on context.

Czech speakers understand definiteness from the situation, not from an article.

Yes, chci is a tricky word for many learners.

A rough guide:

• ch in Czech is like the ch in Scottish loch or German Bach
• then comes c, which sounds like ts
• then i

So chci is roughly kh-tsi, said quickly as one word.

This consonant cluster is completely normal in Czech, even though it feels unusual to English speakers.

Yes, rezervovat is a normal and useful verb, especially in formal or international-style contexts.

You may also encounter:

• zamluvit = to book/reserve
• objednat = to order/book
• zarezervovat = to reserve/book

But rezervovat is perfectly natural and easy to understand.

For a learner, it is a good standard choice.