Noi vom arunca gunoiul înainte să vină oaspeții.

Yes, it can often be omitted.

Romanian is a pro-drop language, which means the verb form usually already shows who the subject is. In vom arunca, the form vom clearly means we will, so Noi is not strictly necessary.

So both of these are natural:

• Noi vom arunca gunoiul...
• Vom arunca gunoiul...

Including Noi can add emphasis, contrast, or clarity, as in We will take out the trash, before the guests come.

Vom arunca is the future tense.

It is made from:

• vom = we will
• arunca = the infinitive/base form to throw

So:

• voi arunca = I will throw
• vei arunca = you will throw
• va arunca = he/she will throw
• vom arunca = we will throw
• veți arunca = you all will throw
• vor arunca = they will throw

In this sentence, vom arunca gunoiul means we will throw away / take out the trash.

Because gunoiul is the definite form: the trash.

Romanian usually puts the definite article at the end of the noun, not as a separate word like English the.

• gunoi = trash
• gunoiul = the trash

So vom arunca gunoiul literally means we will throw the trash.

For the same reason: oaspeții means the guests, while oaspeți means guests in a more indefinite sense.

• oaspeți = guests
• oaspeții = the guests

The ending -ii is the definite plural ending here.

So:

• vin oaspeți = guests are coming
• vin oaspeții = the guests are coming

In your sentence, it refers to specific expected guests, so oaspeții is natural.

Because înainte să is a structure that normally requires the subjunctive.

So after înainte să (before), Romanian uses:

• să
  • a special verb form

Here:

• să vină = that they come / come in a subjunctive structure

So:

• înainte să vină oaspeții = before the guests come

This is one of the most important patterns to learn:

• după ce vin = after they come
• înainte să vină = before they come

Romanian does not usually say înainte vin oaspeții for this meaning.

Vină is the 3rd person singular/plural subjunctive form of a veni (to come), used after să.

From a veni:

• indicative: vine = he/she comes
• subjunctive: să vină = that he/she/they come

In Romanian, the same vină form works here for:

• el/ea să vină = he/she comes
• ei/ele să vină = they come

Since oaspeții is plural, the meaning is before the guests come, even though the subjunctive form itself is the same as singular.

Because Romanian often uses a arunca gunoiul to mean to throw away / take out the trash without needing a separate word like English away or out.

Literally, a arunca means to throw, but in context:

• a arunca gunoiul naturally means to throw away the trash / take out the trash

So the Romanian expression is a bit more compact than the English one.

Not completely. Romanian word order is fairly flexible, although some versions sound more neutral than others.

The neutral order here is:

• Noi vom arunca gunoiul înainte să vină oaspeții.

But you could also hear:

• Vom arunca gunoiul înainte să vină oaspeții.
• Gunoiul îl vom arunca înainte să vină oaspeții.
  (more emphasis on the trash)

So word order can change for emphasis, but the original version is a very normal, straightforward sentence.

A rough English-friendly guide would be:

• înainte ≈ uhn-EYEN-teh
• să ≈ suh with a very short vowel
• vină ≈ VEE-nuh
• oaspeții ≈ wahs-PEH-tsee

A few pronunciation notes:

• ă is a short central vowel, something like the a in sofa
• â / î is a Romanian vowel that does not exist exactly in English; learners often approximate it at first
• ții at the end of oaspeții sounds like tsee

You do not need a perfect accent to be understood, but these endings are worth practicing.

Să is a very common particle used to introduce the subjunctive.

It often appears after:

• expressions of desire
• necessity
• possibility
• purpose
• time expressions like înainte să

Examples:

• Vreau să vin. = I want to come.
• Trebuie să plec. = I have to leave.
• Înainte să vină oaspeții... = Before the guests come...

So in your sentence, să is not a word you translate directly by itself every time; it is part of the grammar pattern.

Yes, very often.

Depending on context, a arunca gunoiul can correspond to:

• throw away the trash
• take out the trash
• sometimes even get rid of the garbage

If the context is household chores, English speakers will often naturally say We’ll take out the trash before the guests come.

So even if the literal verb is throw, the idiomatic English translation may vary.

In Romanian, a comma is not normally required before this kind of subordinate time clause when it follows the main clause in a simple sentence like this.

So this is standard:

• Noi vom arunca gunoiul înainte să vină oaspeții.

Romanian comma usage does not always match English punctuation habits exactly, so it is best to learn these patterns as you encounter them.

Yes, both exist, but they are not exactly identical.

• oaspeți = guests, visitors
• invitați = invited guests, invitees

Oaspeți is a very natural choice if people are coming to your home.
Invitați emphasizes that they were invited.

So:

• înainte să vină oaspeții = before the guests come
• înainte să vină invitații = before the invited guests come

Both are possible, but oaspeții feels very natural in this sentence.