Ο αδερφός μου αγόρασε καρό σακάκι, αλλά εγώ το βρίσκω πολύ έντονο.

In Greek, you normally use the definite article with family members and with possessives.

So Greek says:

ο αδερφός μου = my brother
literally: the brother of me

This is completely normal Greek. English drops the article, but Greek usually keeps it.

Similar examples:

• η μητέρα μου = my mother
• ο πατέρας σου = your father
• το σπίτι μας = our house

Yes. Both mean brother.

• αδερφός is very common in everyday spoken Greek.
• αδελφός is a bit more formal or traditional.

So in conversation, αδερφός sounds natural and common.

Because Greek possessive words like μου, σου, του, της, μας, σας, τους usually come after the noun.

So:

• ο αδερφός μου = my brother
• το βιβλίο σου = your book
• η φίλη της = her friend

This is one of the most basic Greek possessive patterns.

Αγόρασε is the aorist form, which is often the main past tense in Greek for a completed action.

Here it means bought.

It is:

• 3rd person singular
• from the verb αγοράζω = buy

So:

• αγοράζω = I buy / I am buying
• αγόρασε = he/she bought

In this sentence, the subject is ο αδερφός μου, so αγόρασε means my brother bought.

Καρό means checked, checkered, or plaid, depending on context.

With clothes, it usually refers to a pattern of squares or crossing lines.

So καρό σακάκι is a checked/plaid jacket.

A useful point: καρό is commonly treated as an indeclinable adjective, so it usually does not change form:

• καρό σακάκι
• καρό πουκάμισο
• καρό φούστα

Because σακάκι is a neuter noun in Greek.

Its dictionary form is το σακάκι = jacket / blazer.

Greek nouns have grammatical gender, and σακάκι happens to be neuter. That affects other words that refer to it.

For example:

• το σακάκι
• το βρίσκω
• έντονο

They are all neuter singular because they refer to the same thing.

Yes, the verb is often enough in Greek, because the verb ending usually shows the subject.

So Greek could simply say: ... αλλά το βρίσκω πολύ έντονο.

But εγώ is added here for contrast or emphasis:

• my brother bought it, but I find it too bold / too loud

So αλλά εγώ is like saying: but I, as for me, or but I personally

This is very natural in Greek when contrasting two people’s views.

Το is the direct object pronoun, meaning it.

It refers back to σακάκι:

• σακάκι is neuter singular
• so the pronoun is το

Greek often uses object pronouns before the verb:

• το βλέπω = I see it
• το θέλω = I want it
• το βρίσκω = I find it

So here: το βρίσκω πολύ έντονο = I find it very bold / too loud

Yes, but not in the sense of locate something physically.

Greek βρίσκω can also mean find/consider/judge something in a certain way, just like English:

• I find it interesting
• I find it difficult
• I find it too loud

So: το βρίσκω πολύ έντονο means something like:

• I find it very bold
• I find it too strong
• I find it too loud (especially for clothing, colors, style)

Because έντονο agrees with το, which refers to το σακάκι.

Since σακάκι is:

• neuter
• singular

the adjective also becomes:

• neuter singular → έντονο

Compare:

• ο θόρυβος είναι έντονος = the noise is intense
• η μυρωδιά είναι έντονη = the smell is strong
• το χρώμα είναι έντονο = the color is strong

In this sentence, even though έντονο comes after βρίσκω, it still describes the object it / the jacket.

Because πολύ here is an adverb, not an adjective.

It modifies έντονο, meaning very.

So:

• πολύ έντονο = very intense / very bold

When πολύ means very, it does not change form.

Compare:

Adverb

• πολύ καλός = very good
• πολύ όμορφη = very beautiful
• πολύ έντονο = very bold/intense

Adjective

• πολύς κόσμος = a lot of people
• πολλή ζέστη = a lot of heat
• πολύ νερό = a lot of water

So in your sentence, πολύ is fixed because it means very.

It is natural word order, and it highlights the contrast nicely.

A few things are happening:

• αλλά = but
• εγώ is placed early for emphasis: but I
• το comes before the verb because object pronouns usually do that
• πολύ έντονο comes after the verb as the description of the object

So the structure feels like: but I find it very bold

Greek word order is more flexible than English, but this version sounds very normal and clear.