Η διασκέδαση αρχίζει τώρα.

η is the feminine singular definite article, so it means the.

In this sentence:

• η διασκέδαση = the fun / the entertainment

A few useful points:

• η is used with feminine singular nouns in the nominative case.
• It is pronounced i.
• Greek articles change for gender, number, and case, much more than English the does.

Because διασκέδαση is simply a noun that belongs to the feminine gender in Greek. Grammatical gender in Greek is a normal part of how nouns work; it does not necessarily mean the thing itself is biologically female.

So:

• η διασκέδαση = feminine noun
• that is why it takes the article η

This is something you usually have to learn along with the noun itself:

• not just διασκέδαση
• but η διασκέδαση

That helps you remember its gender.

αρχίζω is the dictionary form of the verb, meaning I begin / I start.

In the sentence, the subject is η διασκέδαση = the fun / the entertainment, which is third person singular, so the verb must match it:

• αρχίζω = I begin
• αρχίζεις = you begin
• αρχίζει = he/she/it begins

So:

• Η διασκέδαση αρχίζει = The fun begins

Greek verbs change form depending on the subject, just like English changes I am vs he is, though Greek usually does this more systematically.

It can mean either, depending on context.

Greek present tense often covers both:

• begins
• is beginning
• sometimes even a more general starts

So Η διασκέδαση αρχίζει τώρα can naturally mean:

• The fun begins now
• The fun is beginning now
• The entertainment starts now

English chooses between simple and progressive more often than Greek does.

Here it is in the nominative case, because it is the subject of the sentence.

• Η διασκέδαση = the subject
• αρχίζει = the verb
• τώρα = now

A useful detail: with this noun, the noun form itself is the same in nominative and accusative singular:

• nominative: η διασκέδαση
• accusative: τη διασκέδαση

So often the article helps show the case more clearly than the noun ending does.

Yes, Greek word order is more flexible than English.

This version is a very straightforward order:

• subject + verb + adverb
• Η διασκέδαση αρχίζει τώρα

But Greek could also say:

• Τώρα αρχίζει η διασκέδαση = Now the fun begins
• Αρχίζει τώρα η διασκέδαση = also possible, with slightly different emphasis

The meaning stays basically the same, but the emphasis shifts.

For example:

• Η διασκέδαση αρχίζει τώρα sounds neutral.
• Τώρα αρχίζει η διασκέδαση puts more focus on now.

τώρα means now.

In this sentence, it marks the time when the action starts:

• αρχίζει τώρα = begins now

It is a very common adverb. Depending on context, it can mean:

• now
• right now
• at this point

It can also move around in the sentence:

• Τώρα αρχίζει η διασκέδαση
• Η διασκέδαση αρχίζει τώρα

Both are natural.

A good pronunciation guide is:

• Η = ee
• διασκέδαση = thya-SKE-tha-see or dhee-a-SKE-tha-see depending on how you hear/say the first part
• αρχίζει = ar-KHEE-zee
• τώρα = TO-ra

A more phonetic approximation is:

ee dhya-SKE-tha-see ar-KHEE-zee TO-ra

A few sound notes:

• δ sounds like th in this
• χ is the rough sound heard in Scottish loch or German Bach
• ζ here sounds like z
• the stress falls where the accent mark is:
  διασκέδαση, αρχίζει, τώρα

In Modern Greek, the accent mark shows which syllable is stressed.

So:

• διασκέδαση
• αρχίζει
• τώρα

This is very important for pronunciation. Greek spelling normally tells you exactly where the stress goes.

You may notice that η has no accent mark. That is normal here, because short one-syllable function words like articles often appear without one.

Yes, it is a normal and correct word, but its tone depends on context.

διασκέδαση can mean:

• fun
• entertainment
• amusement

So the sentence can sound a little like:

• The fun starts now
• The entertainment begins now

It works especially well in contexts like:

• a show
• an event
• an activity
• an advertisement
• a playful dramatic statement

In very casual speech, Greek might sometimes use other expressions for fun, depending on the situation, but η διασκέδαση αρχίζει τώρα is perfectly natural and clear.

Greek often leaves out subject pronouns like I, you, he, she, because the verb ending already shows the person. But that does not mean you would normally drop an important noun subject like η διασκέδαση if you want to say the fun specifically.

So:

• Αρχίζω τώρα = I’m starting now
  The pronoun I is omitted.
• Η διασκέδαση αρχίζει τώρα = The fun begins now
  The noun subject is kept because it carries the main information.

You could say just Αρχίζει τώρα in context, but then it would mean It begins now or It’s starting now, and the listener would need to know what it is from the situation.