Sunčeva svjetlost ulazi kroz prozor.

Croatian often expresses this idea as Sunčeva svjetlost, literally the Sun’s light or solar light.

• sunčev / sunčeva / sunčevo = sun’s, solar
• svjetlost = light

So Sunčeva svjetlost is a very natural way to say sunlight.

You may also see sunčeva svjetlost written with a lowercase s in normal usage. The capital S is only used if it begins the sentence.

Sunčeva is a possessive adjective formed from Sunce (the sun).

It works like an adjective and agrees with the noun it describes:

• sunčeva svjetlost = solar light / sunlight
• sunčev sjaj = the sun’s shine
• sunčevo zračenje = solar radiation

Here it is in the feminine singular nominative form because svjetlost is feminine singular.

Because it has to agree with svjetlost, which is:

• feminine
• singular
• nominative (the subject of the sentence)

So the adjective also takes the feminine singular nominative form:

• Sunčeva svjetlost

If the noun changed, the form of the adjective would change too.

Yes, svjetlost is feminine.

A useful clue is that many Croatian nouns ending in -ost are feminine, for example:

• radost = joy
• mladost = youth
• vrijednost = value
• svjetlost = light

So in this sentence, svjetlost is the feminine subject, and that is why Sunčeva and ulazi match it the way they do.

Ulazi is the 3rd person singular present tense of ulaziti / ući, meaning to enter, to come in, to go in.

Here it means:

• it enters
• it comes in

The subject is Sunčeva svjetlost, which is grammatically singular, so the verb is singular too:

• Sunčeva svjetlost ulazi = Sunlight enters / is coming in

Yes. Croatian present tense often covers both:

• enters
• is entering
• sometimes even a general habitual sense, depending on context

So ulazi can mean:

• Sunlight enters through the window
• Sunlight is coming in through the window

Croatian does not always make the same strict distinction between simple present and present continuous that English does.

Kroz means through.

It is a preposition, and it requires the noun after it to be in the accusative case.

So:

• kroz = through
• prozor = window
• kroz prozor = through the window

This is a very common pattern in Croatian.

Good question. Prozor is masculine inanimate, and in the singular, many masculine inanimate nouns have the same form in the nominative and accusative.

So:

• nominative: prozor
• accusative: prozor

Even though the form looks unchanged, it is still accusative here because kroz requires accusative.

This is normal in Croatian.

Yes. Croatian word order is more flexible than English word order.

The neutral, straightforward order is:

• Sunčeva svjetlost ulazi kroz prozor.

But other orders are possible for emphasis, for example:

• Kroz prozor ulazi Sunčeva svjetlost.
• Ulazi Sunčeva svjetlost kroz prozor.

These alternatives can sound more literary, emphatic, or context-dependent. For a learner, the original order is the safest and most neutral.

Croatian has no articles like English a / an / the.

So prozor can mean:

• a window
• the window

The exact meaning depends on context.

In this sentence, English naturally says through the window, but Croatian simply says kroz prozor.

They are related, but not always identical.

• svjetlost = light as a phenomenon, brightness, illumination
• svjetlo = light as a light source, lamp, or also light in some contexts

In this sentence, svjetlost is the better choice because we are talking about sunlight as illumination coming through the window.

So Sunčeva svjetlost sounds more natural here than sunčevo svjetlo.

A rough English-friendly guide:

• Sunčeva ≈ SOON-cheh-va
• svjetlost ≈ SVYEHT-lost
• ulazi ≈ oo-LAH-zee
• kroz ≈ krohz
• prozor ≈ PROH-zor

A few helpful notes:

• č sounds like ch in church
• j sounds like y in yes
• z is usually like z in zoo
• Croatian stress is not usually marked in normal writing, so learners often have to pick it up by listening

Only if it starts the sentence.

So:

• Sunčeva svjetlost ulazi kroz prozor. — capitalized because it is sentence-initial
• Vidim sunčevu svjetlost. — lowercase in the middle of a sentence

In normal Croatian spelling, adjectives like sunčev are not capitalized unless regular capitalization rules require it.

It is in the nominative case because it is the subject of the sentence.

You can ask:

• What enters through the window?
• Sunčeva svjetlost.

That tells you it is the subject, so nominative is the expected case.

Both words match in nominative singular feminine:

• Sunčeva = feminine singular nominative
• svjetlost = feminine singular nominative