Η τραγουδίστρια ερμηνεύει το τραγούδι.

A natural pronunciation is roughly:

ee tra-ghoo-DEE-stria er-mi-NEV-ee to tra-GHOO-thee

A few helpful notes:

• Η sounds like ee.
• τραγουδίστρια = stress on -δί-
• ερμηνεύει = stress on -νεύ-
• τραγούδι = stress on -γού-
• Greek δ sounds like the th in this, not like English d.
• Greek γ can sound softer than English g. Before ου, as in τραγούδι, it is closer to a voiced throat sound, often approximated for learners as gh.

Because Greek articles change for gender, number, and case.

In this sentence:

• Η τραγουδίστρια = the singer (feminine singular)
• το τραγούδι = the song (neuter singular)

So Greek does not use just one word for the the way English does. It uses different forms depending on the noun.

Here, the basic singular nominative articles are:

• ο for masculine
• η for feminine
• το for neuter

Because τραγουδίστρια specifically means a female singer.

Greek often distinguishes male and female professions or roles with different noun forms. For example:

• ο τραγουδιστής = the male singer
• η τραγουδίστρια = the female singer

So in this sentence, the subject is clearly female.

There are two main clues:

1. The article and case

   • Η τραγουδίστρια is in the nominative, which is the usual case for the subject.
   • το τραγούδι is in the accusative, which is the usual case for the direct object.

2. The verb meaning

   • ερμηνεύει means performs / interprets / renders
   • So it makes sense that the singer performs the song

In English, word order is the main clue. In Greek, word order helps too, but case is very important.

In this sentence, ερμηνεύει means something like:

• performs
• interprets
• renders

When talking about music, it often means performs a song or piece.

It is a little more formal or specific than just sings.
If you said:

• Η τραγουδίστρια τραγουδά το τραγούδι = The singer sings the song

that is more direct and literal.
But:

• Η τραγουδίστρια ερμηνεύει το τραγούδι

can suggest a performance or artistic interpretation.

Because this is the third person singular present tense form:

• ερμηνεύω = I perform / interpret
• ερμηνεύει = he/she/it performs / interprets

Since the subject is η τραγουδίστρια = the singer / she, the verb must be the she form.

So:

• Η τραγουδίστρια ερμηνεύει = The singer performs

The accent mark shows which syllable is stressed.

So:

• τραγουδίστρια → tra-ghoo-DEE-stria
• ερμηνεύει → er-mi-NEV-ee
• τραγούδι → tra-GHOO-thee

Stress matters in Greek, both for pronunciation and sometimes for distinguishing forms. You should learn words together with their accent marks.

Yes, Greek word order is more flexible than English word order.

The neutral, straightforward order here is:

• Η τραγουδίστρια ερμηνεύει το τραγούδι.

But you could also say:

• Το τραγούδι ερμηνεύει η τραγουδίστρια.

This can shift the emphasis, for example toward the song.

Even though word order can change, the articles and case endings still help show who is doing what.

Τραγούδι is a neuter noun, so it takes the neuter article το in the singular.

That is why you get:

• το τραγούδι = the song

Many Greek neuter nouns end in -ι, though not all.
Here, both the article and the noun form tell you it is neuter.

It is both:

• as a letter, Η / η is the Greek letter eta
• in this sentence, Η is being used as the feminine singular definite article = the

Because it is the first word of the sentence, it is capitalized: Η instead of η.

So here it means the, not just the standalone letter.

You would change the subject noun and its article:

• Ο τραγουδιστής ερμηνεύει το τραγούδι.

That means:

• The male singer performs the song.

Notice:

• Η τραγουδίστρια → feminine
• Ο τραγουδιστής → masculine

The verb ερμηνεύει stays the same, because both he performs and she performs use the same third person singular form in Greek.