Arkadaşım bana hâlâ küs, çünkü geç geldim.

Arkadaşım is made of:

• arkadaş = friend
• -ım = my

So arkadaşım literally means my friend.

This is a very common Turkish pattern:

• ev = house

• evim = my house

• kitap = book

• kitabım = my book

• arkadaş = friend
• arkadaşım = my friend

The ending changes shape because of vowel harmony, so you will also see forms like -im, -um, -üm.

Because bana is the dative form of ben.

• ben = I
• bana = to me

In this sentence, küs works with the person you are upset with in the dative:

• birine küs olmak = to be upset with someone / to be sulking at someone

So:

• Arkadaşım bana küs = My friend is upset with me

This is something learners often just have to memorize: küs takes -e / -a on the person.

Other examples:

• Ben sana küsüm. = I’m upset with you.
• O ona küs. = He/She is upset with him/her.

Hâlâ means still.

So bana hâlâ küs means still upset with me.

It shows that the situation continues up to now. The friend was upset before, and that has not changed yet.

You will often see hâlâ in sentences like:

• Hâlâ burada mı? = Is he/she still here?
• Hâlâ bekliyorum. = I’m still waiting.

The circumflex in hâlâ helps distinguish it from other words and can also reflect pronunciation.

• hâlâ = still
• hala = paternal aunt

In everyday typing, many people omit the circumflex and write hala, but in careful writing hâlâ is preferred for still.

So in your sentence, hâlâ definitely means still, not aunt.

Not exactly.

Küs usually means something like:

• upset with someone
• offended
• sulking
• not speaking to someone because of hurt feelings

It is often more specific than plain angry. It suggests a relationship problem: someone is hurt, offended, or cold toward another person.

So:

• Arkadaşım bana küs
  means more than just My friend is angry at me.
  It can suggest My friend is upset with me and acting distant / not talking to me.

A related word is kızgın, which is more directly angry.

Yes, from an English point of view, it may feel like the verb is is missing.

In Turkish, in the present tense, 3rd person sentences with nouns or adjectives often do not use an overt word for is.

So:

• O mutlu. = He/She is happy.
• Arkadaşım bana küs. = My friend is upset with me.

Here, küs is the predicate, and Turkish does not need a separate word for is in this kind of sentence.

Compare:

• Ben mutluyum. = I am happy.
• Sen mutlusun. = You are happy.
• O mutlu. = He/She is happy.

And with küs:

• Ben sana küsüm. = I am upset with you.
• Sen bana küssün. = You are upset with me.
• O bana küs. = He/She is upset with me.

In this sentence, küs is functioning like an adjective/state word: upset, offended, sulking.

There is also a related verb:

• küsmek = to become offended / to sulk / to stop speaking to someone

Examples:

• Bana küstü. = He/She got upset with me.
• Bana hâlâ küs. = He/She is still upset with me.

So the sentence uses the state someone is in, not the action of becoming upset.

Çünkü means because.

It introduces the reason:

• Arkadaşım bana hâlâ küs, çünkü geç geldim.
• My friend is still upset with me, because I came late.

This structure is very natural in Turkish:

• main statement + çünkü
  • reason

You can also express because in other ways in Turkish, for example with -diği için or -dığı için:

• Geç geldiğim için arkadaşım bana hâlâ küs.

That means the same thing, but the grammar is different.

Literally, it is:

• geç = late
• geldim = I came

So geç geldim = I came late / I arrived late

This is a very common way to say that you arrived later than expected.

Geldim comes from the verb gelmek = to come.

Breakdown:

• verb stem: gel- = come
• past tense: -di
• 1st person singular: -m

So:

• gel + di + m → geldim
• I came

Other examples from the same verb:

• geldin = you came
• geldi = he/she came
• geldik = we came
• geldiler = they came

Yes, both can be possible, but they are slightly different.

• geç geldim = I came late / I arrived late
• geç kaldım = I was late

In many situations, they are very close in meaning.

Your sentence uses geç geldim, which focuses directly on the fact that the speaker arrived late.

If you changed it to:

• Arkadaşım bana hâlâ küs, çünkü geç kaldım.

that would also sound natural and would mean something like My friend is still upset with me because I was late.

Turkish word order is flexible, but this is a very natural order.

• Arkadaşım = subject
• bana = to me
• hâlâ = still
• küs = predicate/state

A simple way to understand it is:

• My friend
  • with me/to me
    • still
      • upset

Turkish often puts the main predicate at the end of the clause, so küs comes last.

The second clause also follows a common pattern:

• geç
  • geldim
• late
  • I came

Adverbs like geç often come before the verb.

Yes, Turkish allows some movement for emphasis, but bana hâlâ küs is very natural.

For example, you may also hear:

• Arkadaşım hâlâ bana küs.

This is also correct. The meaning stays very close.

The version in your sentence sounds smooth and neutral. In practice, learners should first get comfortable with the original order before experimenting with alternatives.

Yes, it sounds natural.

A native speaker might also say similar things like:

• Arkadaşım bana hâlâ kırgın, çünkü geç geldim.
• Arkadaşım bana hâlâ kızgın, çünkü geç geldim.
• Arkadaşım bana hâlâ küs, çünkü geç kaldım.

But your original sentence is completely normal and idiomatic.

These are similar, but not identical:

• küs = upset with someone in a personal, relational way; often not talking much
• kırgın = hurt, offended, emotionally wounded
• kızgın = angry

So:

• Bana küs = upset with me, sulking at me
• Bana kırgın = hurt/offended by me
• Bana kızgın = angry with me

In your sentence, küs gives a nice sense of personal tension between friends.

The comma separates the main clause from the reason clause:

• Arkadaşım bana hâlâ küs, çünkü geç geldim.

This is very common in written Turkish and helps readability.

In casual writing, punctuation may vary, but using the comma here is normal and clear.