Вони хочуть одружитися тихо, без великого свята.

Вони means they.

In Ukrainian, subject pronouns are often optional, because the verb ending already shows who is doing the action. So you could also say:

Хочуть одружитися тихо, без великого свята.

However, Вони is often included for clarity, emphasis, or because it sounds more natural in context. English requires they, but Ukrainian does not always need it.

Хочуть is the 3rd person plural present tense form of хотіти — to want.

So:

• я хочу = I want
• ти хочеш = you want
• він/вона хоче = he/she wants
• ми хочемо = we want
• ви хочете = you want
• вони хочуть = they want

In this sentence, хочуть matches Вони.

Одружитися means to get married.

It is a verb describing the act of entering marriage. In this sentence, it is used after хочуть:

• хочуть одружитися = want to get married

A useful thing to know is that одружитися is not usually used like English to marry someone directly. It more naturally means to get married.

The ending -ся is a common Ukrainian reflexive ending. It often gives the idea that the action happens to oneself, mutually, or as a kind of self-contained action.

With одружитися, the meaning is basically to marry / to get married.

This is very common in Ukrainian verbs. For example:

• вчити = to teach
• вчитися = to study / learn

So here, одружитися is simply the normal dictionary form for to get married.

Yes, it matters.

Одружитися is perfective, meaning it presents the marriage as a completed event — getting married as a single whole action.

Its imperfective partner is одружуватися.

In this sentence, одружитися is natural because they want to reach that result — to get married.

Very roughly:

• одружитися = to get married, as a completed event
• одружуватися = to be getting married / to get married in a more ongoing or repeated sense

After хотіти, both aspects can appear in Ukrainian depending on the meaning, but here the perfective form is the most natural choice.

Yes, тихо is an adverb.

It comes from тихий = quiet.

Here it means something like:

• quietly
• in a low-key way
• without much public attention

So одружитися тихо does not necessarily mean literally without making noise. It more likely means to have a quiet, modest wedding.

The preposition без always takes the genitive case.

So:

• свято = celebration, feast, holiday
• genitive singular: свята

And the adjective must agree with the noun:

• велике свято = a big celebration
• genitive singular: великого свята

So:

• без великого свята = without a big celebration

This is a very useful pattern to remember:

• без цукру = without sugar
• без проблем = without problems
• без великого свята = without a big celebration

Свято can mean holiday, festival, or celebration, depending on context.

In this sentence, it means a celebration or festive event — basically the big wedding party or formal festivities.

So без великого свята suggests:

• no big celebration
• no large wedding party
• no major festive event

Yes. Ukrainian word order is fairly flexible.

Both of these are natural:

• Вони хочуть одружитися тихо, без великого свята.
• Вони хочуть тихо одружитися, без великого свята.

The difference is mostly one of focus and rhythm, not basic meaning.

The original version puts одружитися first and then adds details about how they want to do it:

• get married
• quietly
• without a big celebration

That sounds very natural.

Yes, there are a few possibilities.

Common ones include:

• одружитися — to get married
• побратися — to get married, often a little more conversational or idiomatic

Also, gender can matter in some expressions:

• одружитися is traditionally associated with a man getting married
• вийти заміж is traditionally used for a woman: to get married
• in modern usage, одружитися is often understood more generally too, especially in learner materials

Since the subject here is Вони (they), одружитися works well as a general plural idea: they want to get married.

All of those are possible ways to understand it.

The Ukrainian sentence suggests the idea of a small, low-key marriage, so depending on context, it could correspond to:

• They want to get married quietly
• They want to get married privately
• They want to get married without a big celebration
• They want a simple wedding

The exact nuance depends on context, but тихо, без великого свята strongly suggests low-key and not extravagant rather than just literal silence.