Ο θαυμασμός μου για τη δασκάλα είναι μεγάλος, γιατί δεν δείχνει ποτέ αδιαφορία.

Ο θαυμασμός μου means my admiration.

• ο θαυμασμός = the admiration
• μου = my

Greek often uses the definite article with nouns in places where English might not emphasize it as much. So ο θαυμασμός μου is the normal way to say my admiration.

Also, θαυμασμός is a masculine noun, which is why it takes ο.

In Greek, possessive forms like μου (my), σου (your), του/της (his/her) usually come after the noun:

• η φίλη μου = my friend
• το βιβλίο μου = my book
• ο θαυμασμός μου = my admiration

This is one of the most basic word-order differences from English.

για here means for or toward, depending on how you understand the phrase.

So:

• θαυμασμός για κάποιον/κάτι = admiration for someone/something

In this sentence:

• για τη δασκάλα = for the teacher

After για, Greek uses the accusative case, which is why the noun appears as τη δασκάλα.

Both are connected forms of the feminine accusative article:

• full form: την
• shortened form: τη

In modern Greek, την often becomes τη before many consonants in normal speech and writing.

So:

• την δασκάλα and τη δασκάλα both mean the same thing
• τη δασκάλα is very common and natural

You will also see the same with τον/τον sometimes written without the final -ν depending on the following sound.

Because μεγάλος has to agree with θαυμασμός, not with δασκάλα.

• θαυμασμός is masculine singular
• so the adjective must also be masculine singular
• therefore: μεγάλος

This is standard adjective agreement in Greek:

• masculine: μεγάλος
• feminine: μεγάλη
• neuter: μεγάλο

So the sentence is literally saying: My admiration for the teacher is great.

Literally, yes, μεγάλος often means big or large. But in this sentence it means great, strong, or considerable.

So ο θαυμασμός μου είναι μεγάλος means something like:

• my admiration is great
• I admire her a lot

Greek often uses μεγάλος with abstract nouns in this broader sense.

γιατί means because in this sentence.

So the structure is:

• Ο θαυμασμός μου ... είναι μεγάλος = My admiration ... is great
• γιατί ... = because ...

It introduces the reason:

• γιατί δεν δείχνει ποτέ αδιαφορία
• because she never shows indifference

Be aware that γιατί can also mean why in questions:

• Γιατί έφυγες; = Why did you leave?

So context tells you whether it means because or why.

Greek often omits subject pronouns when they are understood from the verb form or the context.

Here, δείχνει means he/she/it shows, and from the context we know it refers to the teacher.

So Greek does not need to say αυτή (she).
It would be grammatical, but unnecessary:

• δεν δείχνει ποτέ αδιαφορία = she never shows indifference

This is very common in Greek.

δεν is the basic negation word meaning not.
δείχνει means shows.

So:

• δείχνει = shows
• δεν δείχνει = does not show

Notice that Greek does not need an extra word like English does.
English says she does not show; Greek simply says δεν δείχνει.

ποτέ means ever or never, depending on whether the sentence is negative.

With δεν, it means never:

• δεν ... ποτέ = never

So:

• δεν δείχνει ποτέ αδιαφορία = she never shows indifference

Its position is natural here, between the verb and the noun, but Greek word order is somewhat flexible. The important thing is that δεν and ποτέ together create the meaning never.

Because Greek, like English, often leaves out the article with abstract nouns when speaking in a general sense.

Here αδιαφορία means indifference as a quality or attitude, not a particular indifference.

So:

• δείχνει αδιαφορία = shows indifference

If you added an article, it would usually sound more specific or context-dependent.

The sentence as written is very natural, but Greek word order is often more flexible than English because the grammar is shown by endings and articles.

For example, the main idea could be rearranged for emphasis, though not every version sounds equally neutral:

• Ο θαυμασμός μου για τη δασκάλα είναι μεγάλος
• Μεγάλος είναι ο θαυμασμός μου για τη δασκάλα

The original order is the most straightforward and neutral.
Word order changes in Greek usually affect emphasis, not the basic meaning.

Because γιατί introduces a subordinate clause giving the reason:

• main clause: Ο θαυμασμός μου για τη δασκάλα είναι μεγάλος
• reason clause: γιατί δεν δείχνει ποτέ αδιαφορία

Greek commonly uses a comma before such a clause, especially in careful writing. It helps separate the main statement from the explanation.

Yes. That would mean I admire the teacher a lot, and it is more direct.

Compare:

• Ο θαυμασμός μου για τη δασκάλα είναι μεγάλος
  = My admiration for the teacher is great
• Θαυμάζω πολύ τη δασκάλα
  = I admire the teacher a lot

The original sentence sounds a bit more formal or reflective because it uses the noun θαυμασμός instead of the verb θαυμάζω.