Na stromym zboczu leży kamień.

After na, Polish uses different cases depending on meaning:

• location → locative
• movement toward somewhere → accusative

In Na stromym zboczu, the meaning is on a steep slope as a location, so zboczu is in the locative singular.

Compare:

• Na stromym zboczu leży kamień. = The stone is on the steep slope.
• Kamień stoczył się na strome zbocze. = The stone rolled onto the steep slope.

So here, na + locative shows where something is.

Because the adjective has to agree with the noun it describes.

The noun is zbocze (slope), which is:

• neuter
• singular
• here in the locative

So the adjective stromy (steep) must also be neuter singular locative, which gives:

• stromym

A quick pattern:

• strome zbocze = a steep slope (nominative/accusative)
• na stromym zboczu = on a steep slope (locative)

Because zbocze is being used in the locative case after na.

Its singular forms include:

• zbocze = nominative
• zbocza = genitive
• zboczu = dative
• zboczu = locative

So in this sentence:

• base form: zbocze
• after na for location: na zboczu

This is just normal declension. Many Polish neuter nouns change form like this depending on case.

Because kamień is the subject of the sentence, and subjects are normally in the nominative case.

Here:

• kamień = the thing doing the action of lying
• therefore it stays in nominative singular

So:

• kamień leży = the stone lies / is lying

Leży is the 3rd person singular present tense form of the verb leżeć (to lie, to be lying).

Conjugation examples:

• ja leżę = I am lying
• ty leżysz = you are lying
• on/ona/ono leży = he/she/it is lying

Since kamień is singular, we use leży.

In this sentence, leży means something like:

• lies
• is lying
• is situated lying down

Because leży gives a more specific picture.

• jest just means is
• leży means lies / is lying

So:

• Na stromym zboczu jest kamień. = There is a stone on the steep slope.
• Na stromym zboczu leży kamień. = A stone is lying on the steep slope.

The version with leży sounds more vivid and physical. It suggests the stone is resting there.

Polish word order is flexible, and the beginning of the sentence often shows what the speaker wants to emphasize.

• Na stromym zboczu leży kamień.
  Emphasis first on the location: On the steep slope, there lies a stone.

• Kamień leży na stromym zboczu.
  More neutral if you want to start with the stone.

Both are correct. The version with the location first is very natural in descriptive writing.

Yes, slightly.

Putting the location first can sound a bit more descriptive or scene-setting. It is common in narration, descriptions, and careful speech.

• Na stromym zboczu leży kamień. = a bit more scenic
• Kamień leży na stromym zboczu. = straightforward and neutral

Neither is wrong; they just have a slightly different feel.

A rough guide:

• kamień ≈ KA-myeny? Not exactly. Better: KA-myeń
  The ie softens the m, and ń is a soft n sound, a bit like ny in canyon, but shorter.

• zboczu ≈ ZBO-chu
  cz sounds like ch in chop.

A fuller breakdown:

• Na = nah
• stromym = STRO-mim
• zboczu = ZBO-chu
• leży = LE-zhih
• kamień = KA-myeń

Also:

• ż sounds like the s in measure
• ń is a soft n
• stress in Polish usually falls on the second-to-last syllable

So the main stresses are roughly:

• STRO-mym
• ZBO-czu
• LE-ży
• KA-mień

No. Polish has no articles like a/an and the.

So kamień can mean:

• a stone
• the stone

The exact meaning depends on context.

Likewise, na stromym zboczu can mean:

• on a steep slope
• on the steep slope

If the meaning has already been shown to the learner, that distinction usually comes from the wider context, not from an article.

Kamień is masculine singular.

Yes, that matters for grammar in general, especially with:

• adjectives
• past tense verbs
• pronouns

In this particular sentence, the present tense verb leży does not show gender, so you do not see the masculine gender directly in the verb form.

But you would see it elsewhere, for example:

• duży kamień = a big stone
• kamień leżał = the stone was lying

So even if it is not very visible here, kamień is grammatically masculine.

Sometimes, yes, depending on context.

Zbocze most directly means:

• slope
• hillside
• side of a hill or mountain

So in natural English, you might choose:

• on the steep slope
• on the steep hillside
• on a steep incline

The Polish word is still zbocze; the best English translation depends on what sounds most natural in context.