Wyruszymy z polany i dotrzemy do przełęczy przed wieczorem.

Because both wyruszyć and dotrzeć are perfective verbs.

In Polish, perfective verbs usually express a completed one-time action, and their present-tense forms actually refer to the future.

So:

• wyruszymy = we will set out / we will depart
• dotrzemy = we will reach / we will arrive

You do not say będziemy wyruszyć or będziemy dotrzeć.

A useful contrast:

• wyruszać / docierać = imperfective
• wyruszyć / dotrzeć = perfective

If you wanted to form a future with an imperfective verb, you would use będziemy + infinitive or past participle, for example:

• Będziemy iść = We will be walking / going

But here the sentence is about reaching clear completed results, so perfective verbs are the natural choice.

They are both 1st person plural, meaning we.

Endings:

• wyruszymy = we will set out
• dotrzemy = we will reach

The ending -my is a strong clue that the subject is we.

So even though Polish often leaves out the subject pronoun, the verb form already tells you who is doing the action.

If you added the pronoun, it would be:

• My wyruszymy z polany i dotrzemy do przełęczy przed wieczorem.

But my is usually unnecessary unless you want emphasis.

Because the preposition z meaning from/out of requires the genitive case.

The noun is:

• polana = clearing

Its genitive singular form is:

• polany

So:

• z polany = from the clearing

This is a very common pattern in Polish:

• z domu = from the house
• z miasta = from the city
• z lasu = from the forest
• z polany = from the clearing

So the case change is caused by the preposition z.

Because the preposition do takes the genitive case and often means to, into, or up to, especially when talking about movement toward a destination.

The dictionary form is:

• przełęcz = mountain pass

Its genitive singular is:

• przełęczy

So:

• do przełęczy = to the pass

This is similar to:

• do domu = to home / to the house
• do miasta = to the city
• do lasu = into the forest
• do przełęczy = to the pass

Here przed means before, and in this meaning it takes the instrumental case.

The noun is:

• wieczór = evening

Its instrumental singular form is:

• wieczorem

So:

• przed wieczorem = before evening

This is a very useful pattern:

• przed obiadem = before lunch
• przed nocą = before night
• przed końcem tygodnia = before the end of the week

Be careful: wieczorem can also mean in the evening by itself in many contexts, but here the preposition przed clearly makes it before evening.

Both can sometimes be translated as movement toward a place, but they are not always interchangeable.

• do przełęczy focuses on reaching the pass as a destination
• na przełęcz can also be used in some contexts, especially when thinking of going onto/up to that location

In this sentence, dotrzeć do is the standard construction:

• dotrzeć do czegoś = to reach something

So after dotrzemy, do przełęczy is exactly what you would expect.

This is worth memorizing as a set phrase:

• dotrzeć do celu = reach the goal
• dotrzeć do miasta = reach the city
• dotrzeć do przełęczy = reach the pass

Polish often uses a single subject understood from the verb endings, and then links actions with i (and).

So:

• Wyruszymy z polany i dotrzemy do przełęczy...

literally means:

• We will set out from the clearing and reach the pass...

Since both verbs are in the we form, there is no need to repeat my.

This is completely natural in Polish and very common.

Yes. Polish word order is fairly flexible because the endings show the grammatical relationships.

The original:

• Wyruszymy z polany i dotrzemy do przełęczy przed wieczorem.

Possible alternatives include:

• Przed wieczorem dotrzemy do przełęczy.
• Z polany wyruszymy i dotrzemy do przełęczy przed wieczorem.

But the original version sounds natural and neutral.

In Polish, changing the word order often changes emphasis, not the core meaning.

For example:

• Przed wieczorem dotrzemy do przełęczy puts more focus on before evening.
• Do przełęczy dotrzemy przed wieczorem emphasizes the destination.

Not exactly.

wyruszyć means to set out, to set off, or to depart, often at the beginning of a journey or expedition.

It is a bit more purposeful than some other motion verbs.

Compare:

• wyruszyć = set out, begin a journey
• wyjść = go out, leave on foot / exit
• wyjechać = leave by vehicle / depart, often by car, train, etc.

So in a hiking or mountain context, wyruszyć z polany sounds very natural: set out from the clearing.

dotrzeć means to reach, to get to, to arrive at, often with emphasis on successfully making it to a destination.

It is slightly different from basic motion verbs like:

• przyjść = come/arrive on foot
• dojść = get to, walk to, reach on foot
• dotrzeć = reach, arrive at, make it to

dotrzeć is very common when talking about completing travel successfully, not necessarily focusing on how you moved.

Examples:

• Dotarliśmy do schroniska. = We reached the mountain hut.
• List dotarł wczoraj. = The letter arrived yesterday.
• Dotrzemy do przełęczy przed wieczorem. = We’ll reach the pass before evening.

These words can look intimidating, especially because of clusters like prz, cz, and trz.

A rough guide:

• dotrzemy ≈ do-TSHE-mi
• przełęczy ≈ pshe-WEN-chih or pshe-WEHN-chih as a rough English approximation

A few pronunciation notes:

• rz usually sounds like the zh sound in measure
• cz sounds like ch in church, but harder
• trz is pronounced together, roughly like ch after a t-like beginning
• ł sounds like English w
• ę is nasal; before some consonants it may sound closer to en/em in practice

You do not need to pronounce each letter separately. Polish spelling often looks more complex than the actual sound pattern once you get used to it.

Yes. przełęcz is a feminine noun, but unlike many feminine nouns, it does not end in -a in the dictionary form.

Its nominative singular is:

• przełęcz

Its genitive singular is:

• przełęczy

This type of noun is common enough to be worth noticing. Other feminine nouns can also end in a consonant, especially with a soft ending.

So in this sentence:

• do przełęczy is genitive singular after do

A learner may expect a feminine noun to look like polana, but przełęcz is a different declension pattern.

Yes. The use of perfective future verbs gives the sentence a fairly definite, goal-oriented tone.

• Wyruszymy... i dotrzemy... sounds like a plan or confident prediction:
  • We will set out... and we will reach...

It does not sound hesitant like:

• maybe we’ll get there
• we might reach the pass

So the grammar supports the idea of a planned, expected completed outcome.