Вона приміряє куртку на примірці.

No. Приміряє means is trying on something, usually to see whether it fits or looks good.

Compare:

• приміряти = to try on
• надягати / вдягати = to put on
• носити = to wear

So Вона приміряє куртку is specifically about testing the jacket, not simply wearing it.

Because куртку is the accusative singular form.

Here, куртка is the direct object of the verb приміряє: she is trying on a jacket. In Ukrainian, feminine nouns ending in -а usually change to -у in the accusative singular.

• куртка = nominative
• куртку = accusative

So:

• Куртка гарна. = The jacket is nice.
• Вона приміряє куртку. = She is trying on the jacket/a jacket.

На примірці means something like at a fitting or during a try-on/fitting session.

The noun примірка means fitting or trying-on session. So the sentence suggests that she is trying on the jacket in the context of a fitting.

Not exactly.

• на примірці = at a fitting, during the fitting
• у примірочній = in the fitting room / changing room

So if you mean the physical place, у примірочній is often more natural.

Examples:

• Вона приміряє куртку у примірочній. = She is trying on a jacket in the fitting room.
• Вона була на примірці. = She was at a fitting.

So the original sentence is understandable, but depending on the intended meaning, a native speaker might prefer у примірочній.

Because after на in this meaning, Ukrainian uses the locative case.

The base form is:

• примірка

But after на meaning at/during/on, it becomes:

• на примірці

This is a normal case change. The к changes to ц before -і, which is also normal in Ukrainian declension.

In Ukrainian, на is often used with events, activities, and certain situations:

• на уроці = in class
• на концерті = at the concert
• на зустрічі = at the meeting
• на примірці = at the fitting

So на here does not literally mean on. It is just the preposition Ukrainian uses with this kind of noun.

If you want to talk about being physically inside a room, then у / в is more likely:

• у примірочній = in the fitting room

Because Ukrainian has no articles.

English must choose between a jacket and the jacket, but Ukrainian simply says куртку and leaves that distinction to context.

So куртку can mean:

• a jacket
• the jacket

depending on the situation.

Yes, very often.

Ukrainian frequently drops subject pronouns when the subject is clear from context. So you can say:

• Приміряє куртку.

However, in the present tense, the verb form приміряє only tells you third person singular. It does not tell you whether the subject is he, she, or it. So if that matters, вона is useful.

• Вона приміряє куртку. = clearly she
• Приміряє куртку. = is trying on a jacket, but the subject must be understood from context

It is present tense.

So it can mean:

• she is trying on a jacket right now
• she tries on jackets, depending on context

Like many present-tense forms, the exact English translation depends on the situation. Without extra context, Вона приміряє куртку is often understood as an action happening now.

Yes, that is a good observation. The sentence is grammatical, but it does sound a bit repetitive because both words come from the same root примір-.

A native speaker might rephrase it, depending on the meaning:

• Вона приміряє куртку у примірочній.
• Вона приміряє куртку в магазині.
• Під час примірки вона приміряє куртку. — possible, but also repetitive
• Вона на примірці куртки. — changes the structure and meaning slightly

So the original sentence is understandable, but not the most elegant version if natural everyday style is the goal.

Yes. Ukrainian word order is fairly flexible.

The neutral order here is:

• Вона приміряє куртку на примірці.

But you could also say:

• На примірці вона приміряє куртку.
• Куртку вона приміряє на примірці.

These versions shift the emphasis:

• starting with На примірці highlights the situation
• starting with Куртку highlights the object

So the basic meaning stays similar, but the focus changes.