Η αιμορραγία σταμάτησε.

It is in the nominative singular, because it is the subject of the verb σταμάτησε.

A useful comparison:

• η αιμορραγία = nominative, as the subject
• την αιμορραγία = accusative, as the direct object

For example:

• Η αιμορραγία σταμάτησε.
• Ο γιατρός σταμάτησε την αιμορραγία.

It is the aorist, which here functions like the English simple past: stopped.

The aorist presents the event as a single completed whole. So σταμάτησε means that the bleeding came to an end.

Compare:

• σταμάτησε = stopped
• σταματά / σταματάει = stops / is stopping
• σταματούσε = was stopping / used to stop

The dictionary form is σταματώ or σταματάω.

In this sentence, σταμάτησε is:

• 3rd person singular
• aorist
• active
• indicative

So it means he/she/it stopped, or simply stopped when the subject is a noun such as η αιμορραγία.

It is active in form, not passive.

This sentence does not mean was stopped. It means the bleeding stopped on its own, or at least the sentence presents it that way.

So this is an intransitive use of the verb, just like English The bleeding stopped.

Yes. σταματώ can be used both intransitively and transitively.

• Η αιμορραγία σταμάτησε. = The bleeding stopped.
• Ο γιατρός σταμάτησε την αιμορραγία. = The doctor stopped the bleeding.

So the same verb can mean either stop or stop something, depending on the sentence.

Yes. That is also natural Greek.

Greek word order is more flexible than English. Both of these are correct:

• Η αιμορραγία σταμάτησε.
• Σταμάτησε η αιμορραγία.

The difference is mostly about emphasis and style:

• Η αιμορραγία σταμάτησε is a straightforward subject + verb statement.
• Σταμάτησε η αιμορραγία can sound a little more event-focused or narrative.

Normally, yes.

Greek uses the definite article more often than English does. In ordinary speech, Η αιμορραγία σταμάτησε is the natural full sentence.

Leaving the article out, as in Αιμορραγία σταμάτησε, would sound unusual in normal speech and more like a headline, note, or very compressed style.

A rough English-style pronunciation is:

ee e-mor-ra-YEE-a sta-MA-ti-se

A few helpful points:

• Η is pronounced ee.
• αι in αιμορραγία is pronounced e, not English eye.
• -γία sounds roughly like YEE-a.
• σταμάτησε is stressed on μά.

It can mean both, depending on context.

Because it is related to English hemorrhage, it can sound medical, but it is also the normal Greek word for bleeding. In a sentence like Η αιμορραγία σταμάτησε, it is completely natural.

In Modern Greek, most monosyllabic function words, including the article η, are written without an accent mark.

The words αιμορραγία and σταμάτησε do have accent marks because their stress needs to be shown:

• αιμορραγία
• σταμάτησε

But the article η is unstressed, so no accent is written.