Σήμερα γνώρισα μια καινούρια συμφοιτήτρια, της σύστησα την παρέα μου και αμέσως την συμπάθησα.

Because γνωρίζω / γνώρισα can mean to meet / get to know someone, especially for a first encounter.

So:

• Σήμερα γνώρισα... = Today I met...
• It does not mean I knew in the sense of already being familiar with someone for a long time.

A useful contrast is:

• γνώρισα = I met / got to know
• ήξερα = I knew

So Greek uses γνώρισα very naturally when someone enters your life for the first time.

They agree with συμφοιτήτρια, which is a feminine singular noun.

In Greek, articles and adjectives usually match the noun in:

• gender
• number
• case

Here:

• μια = a (feminine)
• καινούρια = new (feminine)
• συμφοιτήτρια = female fellow student / classmate

So the whole phrase matches:

• μια καινούρια συμφοιτήτρια

If the noun were masculine, you would change the other words too.

συμφοιτήτρια means a female fellow student, often a female university classmate or female student at the same college/faculty.

Related forms:

• συμφοιτητής = male fellow student
• συμφοιτήτρια = female fellow student
• συμφοιτητές / συμφοιτήτριες = plural

A native English speaker might expect just classmate, but συμφοιτήτρια is more specifically someone who studies with you, especially in higher education.

της means to her.

It is an indirect object pronoun. Greek uses these short pronouns very often.

So:

• της σύστησα την παρέα μου
• literally: to her I introduced my group
• natural English: I introduced my group of friends to her

Important structure:

• της = to her
• την παρέα μου = the thing being introduced

In older grammar terms, this role is similar to what English expresses with to.

In Modern Greek, the old dative case no longer exists as a normal case form. Its job is mostly covered by:

• the genitive clitic pronouns like μου, σου, του, της, μας, σας, τους
• or phrases with σε

So της is formally genitive, but in sentences like this it functions as an indirect object:

• της σύστησα... = I introduced ... to her

You could also say the fuller version:

• σύστησα την παρέα μου σε αυτήν

But the short clitic της is more natural here.

Literally, παρέα is something like company, but very often in everyday Greek it means:

• group of friends
• circle
• the people I hang out with

So την παρέα μου here is best understood as:

• my group of friends
• my crowd

That is why the sentence does not just mean formal company. It sounds social and natural.

την means her and is the direct object pronoun.

So:

• την συμπάθησα
• literally: I liked her

Greek often repeats the person with a pronoun instead of repeating the noun. Since συμφοιτήτρια was already mentioned, Greek naturally continues with:

• την = her

This is very normal Greek sentence-building.

No. συμπάθησα is much milder than loved.

It means something like:

• I liked her
• I took a liking to her
• I found her likable

The verb is:

• συμπαθώ = I like / I am fond of
• συμπάθησα = I liked / I took a liking to

So in this sentence, the speaker is saying that they formed a positive impression of her very quickly.

Yes. In modern usage, both can appear, but τη συμπάθησα is very common.

The pronoun is often written as:

• τη(ν)

The final -ν is kept more consistently before:

• vowels
• and certain consonants such as κ, π, τ, γκ, μπ, ντ, τσ, τζ, ξ, ψ

Before σ, many speakers and writers drop it:

• τη συμπάθησα

So the sentence you saw with την συμπάθησα is understandable and acceptable, but τη συμπάθησα is also very natural, and often more typical in contemporary standard writing before σ.

They are all in the aorist, which is the Greek past tense/aspect used for single, complete events.

That fits the sentence well, because it tells a sequence of completed actions:

1. I met
2. I introduced
3. I liked

Greek is showing these as whole events that happened today, not as ongoing background actions.

If the speaker wanted to describe repeated or ongoing actions in the past, Greek would more likely use the imperfect instead.

Yes, from a learner’s point of view, it is worth treating as a form you need to learn.

The verb is:

• συστήνω = I introduce / I recommend
• σύστησα = I introduced / I recommended

The aorist stem is different from the present stem, which is common in Greek verbs. So even though there is a pattern, learners usually memorize this as an important verb pair:

• συστήνω → σύστησα

In this sentence it means introduced, not recommended.

Both can mean new, but καινούρια is very common in everyday speech and works very naturally here.

Roughly:

• καινούριος / καινούρια = new
• νέος / νέα = new, but also young

Because νέα συμφοιτήτρια could sometimes feel a little more formal or potentially ambiguous, καινούρια συμφοιτήτρια sounds very natural for a new fellow student / a new classmate.

Greek often leaves out subject pronouns when they are clear from the verb ending.

Here, each verb already shows first person singular:

• γνώρισα = I met
• σύστησα = I introduced
• συμπάθησα = I liked

So Greek does not need εγώ.

You could add εγώ, but only for emphasis or contrast, for example:

• Εγώ την συμπάθησα, αλλά οι άλλοι όχι.
• I liked her, but the others didn’t.

No, Greek word order is more flexible than English word order.

This sentence has a very natural, neutral flow:

• Σήμερα = sets the time
• then the events are told in sequence

But Greek could move some parts around for emphasis. For example, the clitic pronouns usually stay near the verb, but other elements can shift.

Still, in this sentence the order feels very normal and conversational:

• Σήμερα γνώρισα...
• της σύστησα...
• αμέσως την συμπάθησα

So the word order is not random, but it is also not as rigid as in English.