Το χτύπημα ήταν δυνατό.

το is the definite article, meaning the.

So:

• το χτύπημα = the hit / the blow / the strike

In Greek, articles are used very often, even in places where English might sometimes leave them out.

χτύπημα comes from the verb χτυπάω / χτυπώ, which means to hit, to strike, or sometimes to knock.

As a noun, χτύπημα can mean:

• hit
• blow
• strike
• impact
• sometimes even knock depending on context

So in this sentence, it refers to the hit/blow/impact.

The ending -μα is very common in Greek for nouns that describe:

• the result of an action, or
• the act/event itself

For example:

• γράφω = I write → γράψιμο = writing
• χτυπάω = I hit → χτύπημα = hit / blow

Also, nouns ending in -μα are usually neuter. That is why the article is το.

ήταν is the past tense form of είμαι (to be).

Here it means:

• was

So:

• ήταν δυνατό = was strong

You may also hear ήτανε in spoken Greek. That is a common conversational variant of ήταν. Both mean the same thing, but ήταν is the standard written form.

Because δυνατό is an adjective agreeing with χτύπημα, which is neuter singular.

Greek adjectives change form to match the noun’s:

• gender
• number
• case

The basic pattern here is:

• masculine: δυνατός
• feminine: δυνατή
• neuter: δυνατό

Since χτύπημα is neuter, the adjective must also be neuter:

• το δυνατό χτύπημα = the strong hit
• Το χτύπημα ήταν δυνατό. = The hit was strong.

Not always. δυνατός can mean several related things depending on context:

• strong
• powerful
• loud
• intense

So Το χτύπημα ήταν δυνατό could also suggest:

• The blow was hard
• The impact was powerful
• The hit was intense

The exact English choice depends on context.

Yes, it is completely normal.

The structure is:

• Το χτύπημα = the subject
• ήταν = was
• δυνατό = adjective/predicate

This is the straightforward equivalent of:

• The blow was strong.

Greek word order is often more flexible than English, but this sentence uses the most neutral and natural order.

Yes, but that is not the same sentence.

• Το χτύπημα ήταν δυνατό. = The hit was strong.
• Το δυνατό χτύπημα = the strong hit

So:

• with ήταν, you have a complete sentence
• without ήταν, you just have a noun phrase

It is in the nominative singular.

Why?

Because it is the subject of the sentence:

• Το χτύπημα = the thing being described
• ήταν δυνατό = was strong

The adjective δυνατό is also in the matching nominative neuter singular form.

A simple pronunciation guide is:

• χτύπημα ≈ khTEE-pee-ma

A few details:

• χ is not like English ch in chair
• it is a rough sound, like the h in huge for many speakers, or like the German ch sound
• the stress is on τύ

So the stressed syllable is:

• χΤΥπημα

The accent mark shows which syllable is stressed.

In this sentence:

• χτύπημα → stress on τύ
• ήταν → stress on ή
• δυνατό → stress on τό

Stress matters in Greek pronunciation and sometimes helps distinguish words.

Yes. Depending on context, χτύπημα can be used literally or figuratively.

Possible meanings include:

• a physical blow
• a knock
• an impact
• a strike or attack
• a setback or damaging event

So the sentence could describe:

• a punch
• a collision
• an attack
• even a figurative blow in some contexts

This is Modern Greek.

Clues include:

• the article το
• the noun χτύπημα
• the past form ήταν
• the adjective form δυνατό

Everything here is standard Modern Greek.