En ŝia apartamento estas granda ŝranko kun tri tirkestoj apud la lito.

Yes. In this sentence, estas means is, and Esperanto often uses plain estas for English there is / there are.

So:

• En ŝia apartamento estas granda ŝranko.
• literally: In her apartment is a large wardrobe.
• natural English: There is a large wardrobe in her apartment.

Esperanto does not need a separate dummy word like English there in there is. The idea of existence is often expressed just with estas.

Because Esperanto word order is flexible, and the speaker can put the location first.

• En ŝia apartamento estas granda ŝranko... = In her apartment, there is a large wardrobe...

Starting with En ŝia apartamento puts the location first, which is very natural when introducing something that exists somewhere.

You could also say:

• Granda ŝranko estas en ŝia apartamento.
• Estas granda ŝranko en ŝia apartamento.

But the original version sounds very natural for presenting a scene or describing a room.

Ŝia means her. It refers to some female person already known from context.

Sia is a special reflexive possessive meaning something like his/her/their own, and it is only used when it refers back to the subject of the clause.

In this sentence, there is no personal subject like ŝi that sia could refer back to. The main verb is just estas, and the sentence is presenting existence. So Esperanto uses ordinary ŝia, not reflexive sia.

So:

• ŝia apartamento = her apartment
• not sia apartamento

Because they are different parts of speech:

• granda = adjective, so it ends in -a
• ŝranko = noun, so it ends in -o

This is one of the most regular parts of Esperanto grammar:

• nouns: -o
• adjectives: -a
• plural: -j
• accusative: -n

So:

• granda ŝranko = a large wardrobe
• grandaj ŝrankoj = large wardrobes

Also notice that adjectives agree with nouns. If ŝranko became plural, granda would also become plural:

• grandaj ŝrankoj

Ŝranko is a general word for a cupboard, cabinet, or wardrobe-type piece of furniture. The exact English translation depends on context.

In this sentence, because it has tri tirkestoj (three drawers), English might translate it as:

• wardrobe
• cabinet
• chest/cupboard

The important thing for a learner is that ŝranko is a storage piece of furniture. Context tells you what kind sounds most natural in English.

Tirkestoj means drawers.

It is a compound word:

• tir- = pull
• kesto = box, case, chest
• tirkesto = drawer, literally something like pull-box
• tirkestoj = drawers

This is very typical Esperanto word-building. Instead of memorizing a completely unrelated word, you often get a compound whose meaning is easy to understand once you know the parts.

So:

• kun tri tirkestoj = with three drawers

Because -j marks plural on nouns and adjectives, not on numbers.

• tri = three
• tirkestoj = drawers (plural noun)

Esperanto numbers do not change form:

• unu tirkesto = one drawer
• du tirkestoj = two drawers
• tri tirkestoj = three drawers

So tri stays the same, while the noun takes the plural ending -j.

Yes. Kun tri tirkestoj describes the ŝranko.

So the structure is:

• granda ŝranko
• kun tri tirkestoj
• apud la lito

Together, that means something like:

• a large wardrobe with three drawers next to the bed

The phrase kun tri tirkestoj tells you a feature of the wardrobe: it has three drawers.

It describes the wardrobe, not the apartment.

So the intended meaning is:

• There is a large wardrobe, with three drawers, next to the bed.

Grammatically, Esperanto often relies on normal meaning and proximity here. It would be very odd to interpret apud la lito as describing apartamento, because an apartment is not usually said to be next to the bed in this kind of sentence.

So the natural reading is:

• [granda ŝranko kun tri tirkestoj] apud la lito

La is the definite article, meaning the.

Esperanto uses la when the noun is definite or identifiable in context. In a sentence like this, the bed is natural because the room being described has a specific bed in mind.

So:

• apud la lito = next to the bed

Could Esperanto ever say apud lito? In some contexts, yes, but it would sound less like a particular known bed and more indefinite or generic. In this sentence, la lito is the normal choice.

Because nothing here is a direct object.

The accusative -n in Esperanto is mainly used for:

1. direct objects
2. motion toward something in some expressions

In this sentence:

• En ŝia apartamento is a prepositional phrase
• estas is the verb is
• granda ŝranko is what exists; it is not a direct object
• kun tri tirkestoj is another prepositional phrase
• apud la lito is also a prepositional phrase

Since prepositions like en, kun, and apud already show the relationship, their nouns normally do not take -n here.

Yes. Esperanto allows several word orders, though some sound more natural than others depending on emphasis.

Possible versions include:

• En ŝia apartamento estas granda ŝranko kun tri tirkestoj apud la lito.
• Estas granda ŝranko kun tri tirkestoj apud la lito en ŝia apartamento.
• Granda ŝranko kun tri tirkestoj estas apud la lito en ŝia apartamento.

These do not all emphasize exactly the same thing:

• starting with En ŝia apartamento emphasizes the location first
• starting with Estas feels like introducing something
• starting with Granda ŝranko emphasizes the furniture itself

The original sentence is a very natural descriptive order.

The letter ŝ is pronounced like English sh.

So:

• ŝia sounds roughly like SHEE-ah
• ŝranko sounds roughly like SHRAHN-ko

A few details:

• ŝ = sh
• r is usually trilled or tapped more than in English
• stress in Esperanto is always on the second-to-last syllable

So:

• ŜI-a → stress on ŝi
• ŜRAN-ko → stress on ŝran

This regular pronunciation is one of the nice features of Esperanto.

Yes, very common.

A frequent pattern in Esperanto is:

• En/Sur/Apud... estas ...
• In/On/Next to... there is ...

Examples:

• Sur la tablo estas libro. = On the table there is a book.
• En la ĝardeno estas arbo. = In the garden there is a tree.
• Apud la pordo estas seĝo. = Next to the door there is a chair.

So the sentence you have is using a very standard descriptive structure.