Η αστραπή ήταν τόσο δυνατή που πετάχτηκα από το κρεβάτι.

Η αστραπή means the lightning or, in natural English depending on context, just lightning.

• η = the for a feminine singular noun
• αστραπή = lightning / lightning flash

Greek uses the definite article much more often than English, so where English might simply say lightning, Greek often says the lightning.

Also, αστραπή is feminine, which is why the article is η.

Because δυνατή has to agree with αστραπή, which is feminine singular.

The adjective δυνατός / δυνατή / δυνατό means strong / powerful / loud depending on context.

Here the forms are:

• δυνατός = masculine
• δυνατή = feminine
• δυνατό = neuter

Since αστραπή is feminine, Greek says η αστραπή ήταν τόσο δυνατή.

This is a very common Greek pattern meaning so ... that.

So:

• τόσο δυνατή = so strong / so intense
• που = that

Together:

• ήταν τόσο δυνατή που... = it was so strong that...

You can use this structure with many adjectives and adverbs:

• Ήταν τόσο κουρασμένος που κοιμήθηκε αμέσως.
  He was so tired that he fell asleep immediately.

Ήταν is the past tense of είμαι (to be), specifically the imperfect form: was.

In this sentence, it describes the situation/background:

• Η αστραπή ήταν τόσο δυνατή... = The lightning was so intense...

Greek often uses the imperfect for description or ongoing background in the past, while the next action may be in the aorist:

• ήταν = background/state
• πετάχτηκα = sudden completed action

That combination is very natural in Greek narrative.

Here πετάχτηκα means something like:

• I jumped up
• I sprang
• I jolted up

It comes from πετάγομαι, which can literally suggest to spring / jump / pop up.

In this sentence it does not mean someone physically threw you out of bed. It means you reacted suddenly because of the lightning.

So the sense is:

• I jumped out of bed
• I was jolted out of bed

Because after που, a new clause begins with a different subject.

The sentence structure is:

• Η αστραπή ήταν τόσο δυνατή = The lightning was so intense
• που πετάχτηκα από το κρεβάτι = that I jumped out of bed

Greek often leaves out subject pronouns when the verb ending already shows the person.

Here πετάχτηκα clearly means I jumped / I sprang, so Greek does not need to say εγώ.

It is understood from the verb ending.

Greek is a pro-drop language, which means subject pronouns are often omitted because the verb form already tells you who the subject is.

• πετάχτηκα = I jumped / I sprang

So Greek does not need εγώ unless the speaker wants extra emphasis:

• που εγώ πετάχτηκα από το κρεβάτι would sound emphatic or contrastive, not neutral.

Πετάχτηκα is the aorist form, which usually expresses a single, completed action in the past.

That fits this sentence very well, because jumping out of bed is a sudden event.

So the contrast is:

• ήταν = was → background description
• πετάχτηκα = I jumped / I sprang → one sudden action

This is a very typical Greek storytelling pattern.

Yes, που has several uses in Greek.

Here it introduces a result clause after τόσο, so it means that:

• τόσο δυνατή που πετάχτηκα... = so strong that I jumped...

In other contexts, που can also function as a relative word:

• Το σπίτι που βλέπεις... = The house that you see...

So the meaning depends on the structure around it. After τόσο, που very often means that in the pattern so ... that.

Literally, από το κρεβάτι means from the bed.

But in natural English, with a verb like πετάχτηκα, the best translation is usually:

• out of bed
• from bed

So:

• πετάχτηκα από το κρεβάτι = I jumped out of bed

Also note the grammar:

• από takes the accusative
• το κρεβάτι is accusative singular of κρεβάτι

Greek often uses από in places where English uses from or out of, depending on context.

So από is broader than just one English preposition.

Examples:

• βγήκα από το σπίτι = I came out of the house
• πήρα το βιβλίο από το τραπέζι = I took the book from the table

Here, because of the action jumping up/out, English naturally says out of bed, while Greek simply uses από.

Yes, it can.

Δυνατός / δυνατή / δυνατό can mean:

• strong
• powerful
• intense
• sometimes loud

With weather or sudden natural phenomena, Greek often uses δυνατός/ή/ό in a broader sense than English strong.

So η αστραπή ήταν τόσο δυνατή means the lightning was very intense/powerful. In smooth English, you might translate it more naturally as:

• The lightning was so intense...
• The lightning was so powerful...

Not exactly.

These words are related, but they are not always the same:

• αστραπή = lightning / flash of lightning
• κεραυνός = thunderbolt / lightning strike
• βροντή = thunder

In everyday speech, learners sometimes mix them up. In this sentence, αστραπή refers to the lightning itself.

It is pronounced approximately pe-TAHTH-ee-ka.

A rough breakdown:

• πε = pe
• τάχ = stressed syllable, like tahkh
• τη = tee
• κα = ka

The cluster χτ can feel difficult for English speakers. You do not need to separate it too much; just try to move smoothly through it.

The stress is important:

• πετάχτηκα

Yes, Greek word order is fairly flexible, although this version is very natural.

For example, you might also hear:

• Πετάχτηκα από το κρεβάτι, γιατί η αστραπή ήταν τόσο δυνατή.

That changes the structure slightly to because instead of so...that, but the overall meaning is similar.

The original sentence is very natural because it emphasizes the result:

• The lightning was so intense that I jumped out of bed.

It sounds fairly vivid and natural.

Especially πετάχτηκα από το κρεβάτι gives a strong sense of a sudden reaction. It is the kind of phrase a Greek speaker might use in everyday storytelling when describing being startled.

So the sentence does not sound unnatural or overly literary. It sounds like spoken or standard written Greek with some expressive force.