Din moment ce valiza este goală, cumpărăm obiecte de primă necesitate.

Here it means since, as, or given that.

So the sentence is using din moment ce to introduce a reason:

Din moment ce valiza este goală, cumpărăm obiecte de primă necesitate.
= Since the suitcase is empty, we buy essential items.

Literally, din moment ce can look like from the moment that, but in sentences like this it usually does not express time. It works as a conjunction meaning because/since.

Also, the ce here is just part of the fixed expression din moment ce. It does not mean what in this sentence.

Because valiza means the suitcase, while o valiză means a suitcase.

Romanian usually puts the definite article at the end of the noun:

• valiză = suitcase
• valiza = the suitcase

This is very different from English, where the comes before the noun.

So:

• valiza este goală = the suitcase is empty
• o valiză este goală = a suitcase is empty

In this sentence, the speaker is talking about a specific suitcase, so valiza is the natural choice.

Because Romanian adjectives must agree with the noun in gender and number.

The noun valiză is feminine singular, so the adjective also has to be feminine singular:

• gol = empty, masculine singular
• goală = empty, feminine singular
• goi = empty, masculine plural
• goale = empty, feminine/neuter plural

Since valiza is feminine singular, you get:

valiza este goală = the suitcase is empty

So goală is there because it matches valiza.

Este is the 3rd person singular present form of a fi, meaning to be.

So:

• este = is

In this sentence:

valiza este goală = the suitcase is empty

In everyday speech, Romanians very often shorten este to e:

• Valiza e goală.

That sounds natural and common in conversation.
The full form este is also completely correct and can sound a bit more careful or formal.

Because Romanian often leaves out subject pronouns when the verb ending already shows who is doing the action.

cumpărăm means we buy. The ending -ăm tells you it is 1st person plural.

So Romanian does not need noi every time:

• cumpărăm = we buy
• noi cumpărăm = we buy

Adding noi is possible, but it usually gives emphasis, contrast, or clarity.

For example:

• Cumpărăm obiecte... = We buy items...
• Noi cumpărăm obiecte... = We buy items... perhaps contrasting with someone else

Cumpărăm is the present indicative, 1st person plural, of the verb a cumpăra = to buy.

So:

• a cumpăra = to buy
• cumpărăm = we buy / we are buying

Like many Romanian present-tense forms, it can translate into English in more than one way depending on context:

• we buy
• we are buying

Sometimes Romanian present can even refer to a near future, but here the most straightforward reading is simply we buy / are buying.

It means essential items, basic necessities, or necessities.

Word by word:

• obiecte = objects, items
• de = of
• primă necesitate = first necessity

So literally it is something like items of first necessity, but in natural English that becomes:

• essential items
• basic necessities
• necessities

This is a fairly standard Romanian expression. It sounds a bit more formal than just saying lucruri necesare or lucruri esențiale.

Because Romanian often uses a de + noun phrase structure to describe what kind of things something is.

Here, de primă necesitate works almost like an adjective phrase modifying obiecte.

So:

• obiecte de primă necesitate = items of basic necessity
• natural English: essential items

This kind of structure is very common in Romanian. English often prefers a simpler adjective, but Romanian frequently uses a prepositional phrase instead.

Because the sentence begins with a subordinate clause:

Din moment ce valiza este goală,
then comes the main clause:
cumpărăm obiecte de primă necesitate.

Romanian normally separates an introductory clause like this with a comma, much like English often does:

Since the suitcase is empty, we buy essential items.

So the comma helps show the structure of the sentence clearly.

Yes, but the nuance changes a little.

• pentru că = because
• deoarece = because / since, a bit more formal
• din moment ce = since / given that / seeing that

Din moment ce often suggests that the reason is already accepted, obvious, or taken as a fact.

Compare:

• Din moment ce valiza este goală, cumpărăm obiecte de primă necesitate.
  = Since the suitcase is empty, we buy essential items.

• Pentru că valiza este goală, cumpărăm obiecte de primă necesitate.
  = Because the suitcase is empty, we buy essential items.

• Deoarece valiza este goală, cumpărăm obiecte de primă necesitate.
  = Because/Since the suitcase is empty, we buy essential items.

All are grammatical. Din moment ce feels a little more like given that this is the case.

The letter ă is a very common Romanian vowel. It is usually pronounced like a short, neutral vowel, similar to the a in English about or sofa.

In this sentence:

• goală
• cumpărăm
• primă

all contain ă.

It is not the same as plain a. Romanian distinguishes them clearly:

• a = a fuller ah-type sound
• ă = a more relaxed central sound

For English speakers, ă is often one of the first Romanian vowels to get used to, because it appears extremely often.