Її живіт уже не болить, тому апетит повернувся.

Because її here means her in the possessive sense: her stomach.

• її живіт = her stomach
• їй is the dative form, meaning to her

So:

• Її живіт болить = Her stomach hurts
• Їй боляче = It hurts her / She is in pain

English uses her for both possession and object, but Ukrainian uses different forms.

In Ukrainian, the thing that hurts is usually the grammatical subject.

So literally, живіт болить is structured like:

• the stomach hurts

That is why живіт is in the nominative case.

Compare:

• Мене болить голова is not the standard pattern.
• Standard Ukrainian prefers У мене болить голова or simply Голова болить depending on context.

In your sentence:

• Її живіт уже не болить = Her stomach doesn’t hurt anymore

Here живіт is the subject of болить.

Боліти means to hurt / to ache.

A very common pattern is:

• [body part in nominative] + болить

Examples:

• Голова болить = My/The head hurts
• Зуб болить = My/The tooth hurts
• Живіт болить = My/The stomach hurts

To say whose body part it is, Ukrainian often adds a possessive word:

• Мій живіт болить = My stomach hurts
• Її живіт болить = Her stomach hurts

You can also use a person with у:

• У неї болить живіт = Her stomach hurts
  Literally: At her, the stomach hurts

Both are possible, though У неї болить живіт is very common in everyday speech.

Уже means already. In negative sentences like this one, it often corresponds to English any longer / anymore.

So:

• уже не болить = doesn’t hurt anymore / no longer hurts

Yes, уже and вже mean the same thing. The choice is often phonetic or stylistic:

• уже
• вже

Both are standard. Ukrainian often switches between у/в for smoother pronunciation.

Because не is the normal negation particle in Ukrainian.

• болить = hurts
• не болить = doesn’t hurt

In the sentence:

• уже не болить = no longer hurts / doesn’t hurt anymore

Ukrainian does not need an extra verb like English does. English says does not hurt, but Ukrainian simply puts не before the verb.

Here тому means therefore / so / that’s why.

It connects the two parts of the sentence:

• Її живіт уже не болить = Her stomach doesn’t hurt anymore
• тому апетит повернувся = so her appetite returned

It expresses cause and result.

A close synonym is тому що, but that means because, not therefore:

• тому = so / therefore
• тому що = because

So you should not confuse them.

Because the sentence contains two clauses:

1. Її живіт уже не болить
2. тому апетит повернувся

In Ukrainian, clauses joined by a connector like тому are normally separated by a comma.

So the comma is standard punctuation here.

Because повернутися means to return / to come back, and it is a reflexive verb.

• повернути = to return something
• повернутися = to return / come back oneself

So:

• апетит повернувся = the appetite returned

The -ся part shows that the subject itself comes back.

Compare:

• Він повернув книжку. = He returned the book.
• Він повернувся. = He came back.

In the past tense, Ukrainian verbs agree with the subject in gender and number.

The subject here is апетит, which is masculine singular.

So:

• апетит повернувся = masculine singular

Compare:

• сила повернулася = feminine singular
• бажання повернулося = neuter singular
• сили повернулися = plural

This is a very important feature of the Ukrainian past tense.

Because the sentence describes a current state and a resulting completed change.

• не болить = present tense
  Her stomach doesn’t hurt anymore — this is true now.
• повернувся = past tense
  Her appetite returned — this happened as a result.

English often does the same:

• Her stomach doesn’t hurt anymore, so her appetite has returned / returned.

Ukrainian is simply presenting the situation as:

1. current condition: no pain now
2. result: appetite came back

Yes, absolutely. That is a very natural alternative.

Compare:

• Її живіт уже не болить
• У неї вже не болить живіт

Both mean roughly the same thing: Her stomach doesn’t hurt anymore.

The difference is mostly in structure and emphasis:

• Її живіт... focuses more directly on her stomach
• У неї... is a very common Ukrainian way to say that someone has a symptom or condition

In everyday speech, many speakers would find У неї вже не болить живіт especially natural.

Yes, Ukrainian word order is fairly flexible, though different orders can sound more or less natural depending on emphasis.

The given sentence:

• Її живіт уже не болить, тому апетит повернувся.

is perfectly natural.

You could also hear variations such as:

• Уже її живіт не болить, тому апетит повернувся.
• Її живіт не болить уже, тому апетит повернувся.

But not all variations sound equally neutral. The original sentence has a normal, smooth word order.

As a learner, it is best to keep:

• possessive + noun
• time word like уже
• negation + verb

until you get more comfortable with emphasis patterns.

Its main meaning is appetite, especially physical appetite for food.

So here:

• апетит повернувся = her appetite returned

It can also be used more figuratively in some contexts, like strong desire or eagerness, but the food-related meaning is the most basic and most relevant here.

A very literal version would be:

• Her stomach already does not hurt, therefore appetite returned.

That sounds unnatural in English, but it helps show the Ukrainian structure:

• Її живіт = her stomach
• уже не болить = already not hurts / no longer hurts
• тому = therefore / so
• апетит повернувся = appetite returned

A natural English translation is:

• Her stomach doesn’t hurt anymore, so her appetite has returned.
• or Her stomach doesn’t hurt anymore, so her appetite came back.