Na wesele ubieram się elegancko.

Because na + accusative is commonly used in Polish to mean for an event or occasion.

So na wesele means for the wedding or to a wedding in the sense of the occasion you are dressing for.

• na wesele = for a wedding / to a wedding reception
• na imprezę = for a party
• na pogrzeb = for a funeral

Do wesela usually means until the wedding or sometimes literally to the wedding in a directional sense, depending on context, so it does not fit here.

It is in the accusative case.

The basic form is wesele. In this sentence, after na meaning for/to an event, Polish uses the accusative.

For this noun, the accusative singular looks the same as the nominative singular:

• nominative: wesele
• accusative: wesele

So the form does not change, but the case function does.

Ubieram się means I get dressed or I dress myself.

It comes from the verb ubierać się, which is a reflexive verb. The particle się is very important here.

• ubierać = to dress someone
• ubierać się = to get dressed / to dress oneself

Examples:

• Ubieram dziecko. = I am dressing the child.
• Ubieram się. = I am getting dressed.

So in your sentence, the speaker is talking about how they themselves dress for the wedding.

Because without się, the verb usually means dressing someone else, not yourself.

Compare:

• Ubieram się elegancko. = I dress elegantly / I get dressed elegantly.
• Ubieram córkę elegancko. = I dress my daughter elegantly.

For many learners, się is best understood as marking that the action returns to the subject: I dress myself.

Because elegancko is an adverb, and here it describes how the person dresses.

• elegancki / elegancka / eleganckie = elegant (adjective, describes a noun)
• elegancko = elegantly (adverb, describes a verb)

In this sentence, the verb phrase is ubieram się = I dress / I get dressed, so we need the adverb:

• Ubieram się elegancko. = I dress elegantly.

If you wanted to use the adjective, you would need a noun:

• Mam elegancką sukienkę. = I have an elegant dress.
• To jest elegancki garnitur. = This is an elegant suit.

It can mean either, depending on context.

Polish present tense often covers both:

• I am getting dressed
• I dress
• I usually dress

So Na wesele ubieram się elegancko is most naturally understood as a general or habitual statement:

For a wedding, I dress elegantly.

If you wanted to make it clearly about a future single occasion, Polish might more naturally use a future form, for example:

• Na wesele ubiorę się elegancko. = I will dress elegantly for the wedding.

Polish word order is fairly flexible, and this order puts the occasion first:

• Na wesele = for the wedding
• ubieram się = I dress / get dressed
• elegancko = elegantly

This is a very natural order. It highlights the occasion first.

Other orders are also possible, for example:

• Ubieram się elegancko na wesele.
• Elegancko ubieram się na wesele. (more marked, more emphasis on elegantly)

So the sentence is natural, but not the only possible order.

Not exactly.

• ślub usually means wedding ceremony or marriage
• wesele usually means the wedding reception/celebration

In everyday use, English speakers often translate both as wedding, but in Polish there is a distinction.

So:

• Idę na ślub. = I’m going to the wedding ceremony.
• Idę na wesele. = I’m going to the wedding party/reception.

In your sentence, na wesele suggests dressing for the celebratory event, where dressing elegantly makes perfect sense.

Yes, grammatically you can, and it means I dress elegantly for the wedding ceremony.

The difference is mainly in meaning:

• na ślub = for the ceremony
• na wesele = for the reception/celebration

If you mean the whole wedding event in a general way, native speakers may choose one or the other depending on what part they have in mind.

Yes. Ubierać się is the imperfective verb.

Its perfective partner is ubrać się.

• ubieram się = I dress / I am dressing / I usually dress
• ubiorę się = I will get dressed / I will dress myself

This matters because:

• the imperfective form is natural for habits, repeated actions, or describing the manner of dressing in general
• the perfective form is natural for a single completed action, especially in the future

So:

• Na wesele ubieram się elegancko. = For weddings, I dress elegantly / I dress elegantly for a wedding.
• Na wesele ubiorę się elegancko. = I will dress elegantly for the wedding.

Yes, in practice it can.

In English, we often separate:

• for a wedding = for the occasion
• to a wedding = going there

In Polish, na wesele often covers the idea of the event you are attending, so it can feel like both depending on context.

For example:

• Co założysz na wesele? = What will you wear to the wedding?
• Kupuję sukienkę na wesele. = I’m buying a dress for the wedding.

So na wesele is very natural here.

Yes, sometimes, but the meaning is slightly different.

• elegancko = elegantly, stylishly
• odświętnie = formally, festively, in special-occasion clothes

So:

• Ubieram się elegancko focuses on being elegant
• Ubieram się odświętnie focuses on dressing in a special-occasion way

For a wedding, both can make sense, but elegancko is the simpler and more direct choice.

No, this sentence stays the same.

• Na wesele ubieram się elegancko.

The verb form ubieram się does not change for the speaker’s gender in the present tense, and elegancko is an adverb, so it does not change either.

You would only see gender differences in some past-tense forms, for example:

• Ubrałem się elegancko. = I dressed elegantly. (male speaker)
• Ubrałam się elegancko. = I dressed elegantly. (female speaker)

So in the present tense, the sentence works for anyone.