Ispod starog stabla našli smo ježa.

Ispod means under, below, or beneath.

In this sentence, ispod starog stabla means under/beneath the old tree.

A useful contrast:

• ispod + genitive = below/beneath
• pod + instrumental = under, often in a more direct physical-location sense

For example:

• ispod starog stabla = beneath the old tree
• pod starim stablom = under the old tree

In many contexts they can be close in meaning, but ispod specifically takes the genitive.

Because ispod requires the genitive case.

The noun is stablo = tree.
Its genitive singular form is stabla.

The adjective star = old has to agree with the noun in:

• gender
• number
• case

So:

• stablo = nominative singular
• staro stablo = old tree
• ispod starog stabla = under the old tree

Here, starog is the genitive singular form that agrees with stabla.

Here it means tree.

That can be confusing because stabla can also be the nominative plural form of stablo, meaning trees.

But in this sentence, it is clearly genitive singular because:

• it follows ispod, which takes the genitive
• the adjective starog is also singular genitive

So ispod starog stabla can only mean under the old tree, not under old trees.

Because jež is the direct object of the verb našli smo (we found), so it must be in the accusative case.

The dictionary form is:

• jež = hedgehog

But masculine animate nouns often have:

• nominative singular: jež
• accusative singular: ježa

Since a hedgehog is a living creature, it is treated as animate.

So:

• jež = hedgehog
• našli smo ježa = we found a/the hedgehog

It is the Croatian past tense (often called the perfect).

It is formed with:

• the past participle
• plus the present tense of biti (to be)

So here:

• našli = past participle
• smo = we are / auxiliary part used in the past tense

Together:

• našli smo = we found

A few related forms:

• našao sam = I found (male speaker)
• našla sam = I found (female speaker)
• našli smo = we found (mixed group or masculine/default)
• našle smo = we found (all-female group)

Because naći is not completely regular, and its forms change quite a bit.

Important forms are:

• naći = to find
• nađem = I find
• našao / našla / našli = found

So the past participle našli does not look very close to the infinitive naći. This is something learners usually just need to memorize.

This is a very common Croatian verb, so it is worth learning as a set of forms rather than expecting it to behave like a fully regular verb.

Because smo is a clitic: a short, unstressed word that cannot stand on its own with full stress.

In Croatian, clitics have special word-order behavior. In past tense expressions, verb participle + smo is very common:

• našli smo = we found

Croatian word order is more flexible than English word order, but clitics like sam, si, je, smo, ste, su usually have to appear in specific positions and cannot just go anywhere.

So našli smo ježa sounds natural and standard.

Yes. Croatian word order is fairly flexible because case endings show what each word is doing.

This sentence starts with the location:

• Ispod starog stabla našli smo ježa.

That puts a little emphasis on where the action happened.

Other possible orders include:

• Našli smo ježa ispod starog stabla. = more neutral, very natural
• Ježa smo našli ispod starog stabla. = emphasizes the hedgehog

The basic meaning stays the same, but the emphasis changes.

Because Croatian does not have articles like English a/an and the.

So ježa can mean:

• a hedgehog
• the hedgehog

The exact meaning depends on context.

If Croatian speakers want to be more specific, they can use other words, such as:

• taj jež = that hedgehog
• jedan jež = one / a certain hedgehog

But in many normal sentences, no article is used at all.

Yes. Starog and staroga are both acceptable here.

Both are genitive singular forms agreeing with stabla.

So these both work:

• ispod starog stabla
• ispod staroga stabla

The shorter form starog is very common in everyday language.
The longer form staroga can sound a bit fuller, sometimes a bit more formal or stylistic.

The meaning is the same.

They are:

• ispod = under, below
• star = old
• stablo = tree
• naći = to find
• jež = hedgehog

This is useful because the sentence contains changed forms:

• starog comes from star
• stabla comes from stablo
• našli comes from naći
• ježa comes from jež

So when learning vocabulary, you would usually store the base forms, not just the exact forms you see in the sentence.