Wybieram zwrot do nadawcy.

Wybieram means I choose / I am choosing / I select.

It is:

• 1st person singular
• present tense
• from the verb wybierać = to choose / to select

In Polish, the present tense can often sound natural where English might use either I choose or I’m choosing, depending on context.

Polish often drops subject pronouns when they are clear from the verb form.

So:

• wybieram already means I choose
• adding ja would usually only be for emphasis

Compare:

• Wybieram zwrot do nadawcy. = I choose return to sender.
• Ja wybieram zwrot do nadawcy. = I’m the one choosing return to sender.

Here zwrot means return.

That said, zwrot is a word with several meanings in Polish, depending on context. It can mean things like:

• return
• turn
• phrase / expression
• sometimes refund

In zwrot do nadawcy, it means return to sender.

Because the preposition do requires the genitive case.

The basic form is:

• nadawca = sender

After do, it changes to:

• do nadawcy = to the sender

So:

• nadawca = nominative
• nadawcy = genitive singular

This is a very common pattern in Polish:

• do domu = to the house/home
• do sklepu = to the shop
• do nadawcy = to the sender

Here do means to.

In the phrase zwrot do nadawcy, it expresses direction or destination: the item is being sent back to the sender.

So the phrase works as:

• zwrot = return
• do nadawcy = to the sender

Together: return to sender.

In this sentence, zwrot is the direct object of wybieram, so it is in the accusative case.

However, zwrot is a masculine inanimate noun, and for many masculine inanimate nouns, the accusative looks the same as the nominative.

So:

• nominative: zwrot
• accusative: zwrot

That is why the form does not visibly change.

Yes, it is grammatically correct and understandable, especially in a context like:

• choosing an option in a form
• selecting a delivery/return method
• describing your action

However, in some situations Polish might more naturally use:

• Wybieram opcję zwrotu do nadawcy. = I choose the return-to-sender option.
• Wybieram zwrot do nadawcy can sound a bit like interface language or action narration

So it is natural enough, but the most natural version depends on the exact context.

Because zwrot do nadawcy is the intended relationship: a return to the sender.

If you said zwrot nadawcy, it would suggest something more like the sender’s return, which is a different meaning.

The preposition do makes the direction clear:

• zwrot do nadawcy = return to sender

The dictionary forms are:

• wybierać = to choose / to select
• zwrot = return
• do = to
• nadawca = sender

The sentence uses:

• wybieram from wybierać
• nadawcy from nadawca because of the genitive after do

Yes, Polish word order is fairly flexible, but changing it changes the emphasis.

Neutral order:

• Wybieram zwrot do nadawcy.

Other possible orders:

• Zwrot do nadawcy wybieram. = emphasizes return to sender
• Do nadawcy wybieram zwrot. = possible, but less natural in ordinary speech

So the original sentence is the most straightforward and neutral.

Wybieram comes from wybierać, which is imperfective.

That matters because:

• wybierać / wybieram focuses on the process or ongoing act of choosing
• the perfective partner is usually wybrać
• wybiorę would mean I will choose

So:

• wybieram = I choose / I’m choosing
• wybiorę = I will choose

In a sentence like this, wybieram is natural if you are currently making the selection.

A rough English-friendly pronunciation is:

vih-BYE-ram zfrot do na-DAF-tsih

A few helpful notes:

• wy often sounds roughly like vih
• rz in zwrot is pronounced like a hard zh/sh sound depending on context, but here the cluster is tricky and often sounds close to zfrot
• w in Polish sounds like English v
• c in nadawcy sounds like ts

This is only approximate, but it can help as a starting point.