Όταν νιώθει θυμό, η φίλη μου βγαίνει λίγο έξω και περπατάει.

Here όταν is best understood as when/whenever in a habitual sense.

The sentence is describing something that usually happens, not one single event. So the idea is:

• Whenever she feels anger, my friend goes outside for a bit and walks.

Greek often uses όταν for both:

• a specific when
• a repeated whenever

The broader context tells you which meaning is intended.

Because the sentence describes a general habit or typical reaction.

In English, we also use the present for this:

• When she feels angry, she goes outside and walks.

Greek does the same thing here. The present tense is not necessarily about right now; it can also describe:

• routines
• habits
• things that generally happen

So νιώθει, βγαίνει, and περπατάει all help show a repeated pattern.

Θυμό is the accusative singular form of ο θυμός.

That happens because νιώθω / νιώθει can take a direct object:

• νιώθω χαρά = I feel joy
• νιώθω φόβο = I feel fear
• νιώθει θυμό = she feels anger

So:

• ο θυμός = anger, anger as a noun in dictionary form
• θυμό = anger as the object of the verb

This is very natural Greek.

Because Greek often omits the article with abstract nouns when speaking in a general way.

So νιώθει θυμό means she feels anger, not she feels the anger.

If you added the article, τον θυμό, it would sound more specific:

• a particular anger
• a known or previously mentioned anger

But here the meaning is general, so θυμό without an article is the normal choice.

In standard Modern Greek, possessive clitics like μου usually come after the noun:

• η φίλη μου = my friend
• το σπίτι μου = my house
• ο αδερφός μου = my brother

So η φίλη μου is the normal pattern.

Also, η φίλη μου can mean:

• my female friend
• sometimes my girlfriend, depending on context

In this sentence, it simply means my friend.

Yes, βγαίνει already means goes out, but adding έξω is still very natural and common.

Greek often uses both together for emphasis or clarity:

• βγαίνω έξω = go outside / go out

It works a lot like English go outside, even though go out already suggests leaving an inside space.

In this sentence, έξω makes the movement feel more concrete: she goes outside.

Here λίγο means something like:

• for a little while
• a bit

So βγαίνει λίγο έξω means she goes outside for a bit.

It does not usually mean that she goes only a small distance outside. In this context, it describes the action in a loose, natural way: she steps out briefly.

Yes, both περπατάει and περπατά are correct.

They are two common present-tense forms of the same verb:

• περπατάει
• περπατά

Both mean he/she walks.

This kind of variation is very common in Modern Greek, especially with verbs in -άω / -ώ. The longer and shorter forms can both be standard, though one may sound more natural depending on the speaker or style.

So:

• περπατάει = perfectly normal
• περπατά = also perfectly normal

Yes: Greek word order is more flexible than English word order.

This sentence starts with the time clause:

• Όταν νιώθει θυμό, ...

That puts the situation first: when she feels anger.

Then comes the main clause:

• η φίλη μου βγαίνει λίγο έξω και περπατάει

This order is very natural, but Greek could rearrange parts of the sentence for emphasis. For example, you could also say:

• Η φίλη μου, όταν νιώθει θυμό, βγαίνει λίγο έξω και περπατάει.

That would still be correct.

Greek word order often changes to highlight:

• time
• contrast
• emphasis
• style

Yes, Greek could leave it out.

Because the verb ending already tells you it is third person singular, Greek often omits the subject pronoun or noun when it is understood.

So a sentence like this could be shortened in context:

• Όταν νιώθει θυμό, βγαίνει λίγο έξω και περπατάει.

That would mean:

• When she feels anger, she goes outside for a bit and walks.

However, η φίλη μου is included here to make it clear who the sentence is about.

Because the sentence begins with a subordinate clause introduced by όταν:

• Όταν νιώθει θυμό, ...

Greek normally separates that opening clause from the main clause with a comma, just as English often does:

• When she feels angry, my friend goes outside...

So the comma is standard punctuation here.