Copacul moare iarna.

In Romanian, the definite article is usually attached to the end of the noun instead of being a separate word.

• copac = tree
• copacul = the tree

So -ul is the definite article here.

This is very common in Romanian:

• băiat = boy
• băiatul = the boy

So in Copacul moare iarna, copacul means the tree.

Moare is the 3rd person singular present tense form of the verb a muri, meaning to die.

So:

• eu mor = I die
• tu mori = you die
• el/ea moare = he/she/it dies

Since copacul is singular, Romanian uses the singular verb form moare.

Because a muri is the infinitive form, equivalent to English to die. In a normal sentence, Romanian uses a conjugated form, not the infinitive.

So:

• a muri = to die
• moare = dies

This verb also changes its stem a bit when conjugated, so the present-tense forms do not all look exactly like the infinitive. That is normal for some Romanian verbs.

Yes, literally iarna is the definite form of iarnă:

• iarnă = winter
• iarna = the winter

But in sentences like this, iarna often functions more idiomatically and means in winter or during the winter.

This is very common with seasons in Romanian:

• vara = in summer
• iarna = in winter
• primăvara = in spring
• toamna = in autumn

So even though it looks like the winter, the natural English translation is usually in winter.

Romanian often does not need a preposition with seasons when they are used in this general time-expression sense.

So Romanian can simply say:

• iarna = in winter
• vara = in summer

This is just the normal idiomatic pattern. English needs in, but Romanian often does not here.

By itself, it most naturally sounds like a general statement or a description of what happens in winter.

So it can suggest something like:

• The tree dies in winter
• The tree dies during the winter
• possibly a habitual/general idea depending on context

Romanian present tense is often used for general truths or repeated situations, just like English present tense can be.

If the speaker wanted to make a one-time event very explicit, context or extra words would usually help.

Yes. Romanian word order is more flexible than English word order, although not completely free.

Copacul moare iarna is a very natural order:

• subject + verb + time expression

But you could also say:

• Iarna, copacul moare.

That version gives more emphasis to winter.

The basic meaning stays similar, but the focus can change depending on word order and intonation.

Copac is masculine.

You can tell from forms like:

• un copac = a tree
• copacul = the tree
• doi copaci = two trees

That pattern is masculine.

A simple approximation is:

koh-PA-kul MWA-reh YAR-na

A few notes:

• c in copacul is a hard k sound
• oa in moare is pronounced together, something like mwa
• iarnă / iarna begins with something like yar-

A more careful approximate breakdown:

• copacul → koh-PA-kul
• moare → MWA-reh
• iarna → YAR-na

You would say:

Un copac moare iarna.

Here:

• un copac = a tree
• copacul = the tree

So the difference is:

• Un copac moare iarna. = A tree dies in winter.
• Copacul moare iarna. = The tree dies in winter.