Ο οπαδός χαίρεται πολύ όταν βλέπει γκολ.

Ο is the masculine singular definite article, equivalent to the in English.

So:

• ο = the
• οπαδός = fan / supporter

Together, ο οπαδός means the fan or the supporter.

In Greek, nouns usually appear with an article much more often than in English, especially when talking about a specific person or a general type in a definite way.

οπαδός is in the nominative singular because it is the subject of the sentence.

You can tell this from:

• the article ο, which is nominative masculine singular
• the role of the noun: the fan is the one who is happy and sees

So:

• ο οπαδός = nominative singular masculine
• it functions as the subject

This is a very common question. Χαίρεται looks like a passive form because of the ending -ται, but here it is not passive in meaning.

It comes from the verb χαίρομαι, which means to be glad / to rejoice / to be happy. This verb is one of many Greek verbs that use middle/passive-type endings even when the meaning is active.

So:

• χαίρομαι = I am glad / I rejoice
• χαίρεται = he/she is glad

It does not mean is being gladdened. It simply means is happy / is glad.

Because Greek verbs already show the subject through their endings, Greek often leaves out subject pronouns when they are not needed.

Here:

• χαίρεται = he/she is happy / rejoices
• βλέπει = he/she sees

The subject is understood from the context, and in this sentence it is clearly ο οπαδός.

So Greek does not need to say he explicitly here. Adding αυτός would usually only be for emphasis.

Πολύ here means very.

In this sentence it modifies the verb χαίρεται, so the idea is is very happy / rejoices a lot.

Compare:

• χαίρεται = he is happy / he rejoices
• χαίρεται πολύ = he is very happy / he rejoices a lot

Greek πολύ can correspond to both very and a lot, depending on context.

Όταν means when.

It introduces a time clause:

• όταν βλέπει γκολ = when he sees a goal

In sentences like this, όταν is used for things that happen generally, repeatedly, or whenever the situation occurs.

So the whole sentence has a general meaning:

• the fan is very happy whenever he sees a goal

Because the sentence describes a general or repeated situation, not one single event in the past.

Greek often uses the present tense in both parts of a sentence like this when talking about what usually happens:

• χαίρεται πολύ = he is very happy
• όταν βλέπει γκολ = when he sees a goal

This is similar to English sentences like:

• He gets excited when he sees a goal
• She smiles when she hears that song

So the present here expresses a habitual or general truth.

Most naturally, it means when he sees a goal in the general sense: whenever a goal is scored and he sees it.

The noun γκολ is often used in a very general, indefinite way in sports contexts. Greek does not always need an article like English does.

So:

• βλέπει γκολ = he sees a goal / he sees goals being scored, depending on context

In this sentence, English usually translates it as when he sees a goal.

Γκολ is a loanword from English goal, and it is extremely common in Greek sports language.

A useful thing to know is that γκολ is generally indeclinable, meaning it usually keeps the same form instead of changing endings like many Greek nouns do.

So you may see:

• το γκολ = the goal
• ένα γκολ = a goal
• βλέπει γκολ = he sees a goal / goals

The form γκολ stays the same.

Because Greek can use a bare noun here to express an indefinite or general idea, especially in common expressions.

So:

• βλέπει γκολ = he sees a goal / goals
• βλέπει ένα γκολ = he sees one goal / a goal

Adding ένα would make the object more explicitly singular and indefinite. Without it, the phrase sounds more natural and general in this kind of sports statement.

Yes. Οπαδός can mean:

• fan
• supporter
• follower

In everyday sports contexts, fan or supporter is the most natural meaning.

Outside sports, it can also refer more generally to someone who supports an idea, movement, or person.

A simple pronunciation guide is:

O opaDHOS HEE-re-te poLY OTan VLEpi gol

A few notes:

• δ in οπαδός sounds like the th in this
• χ in χαίρεται is a rough sound, somewhat like the h in huge for many English speakers, though not exactly
• stress matters in Greek:
  • οπαδός
  • χαίρεται
  • πολύ
  • όταν
  • βλέπει

Yes. That is a very natural way to understand it in English.

Greek χαίρεται πολύ can be rendered in different ways depending on what sounds best in English:

• The fan is very happy when he sees a goal
• The fan gets very happy when he sees a goal
• The fan rejoices a lot when he sees a goal

The Greek structure itself is straightforward present tense, but English may choose a slightly different wording to sound natural.