Yorgunluk yüzünden bugün evde kalıyorum.

Yorgunluk yüzünden means because of tiredness / due to fatigue.

It has two parts:

• yorgunluk = tiredness, fatigue
  
  • from yorgun = tired
  • -luk / -lık / -lik / -lük is a common suffix that turns adjectives or nouns into abstract nouns
• yüzünden = because of, due to, on account of

So literally, this part means something like because of tiredness.

They mean different things:

• yorgunluk = tiredness (a noun)
• yorgunum = I am tired (a full predicate)

In this sentence, the speaker is giving the reason in noun form: because of tiredness.

So:

• Yorgunum, bugün evde kalıyorum. = I’m tired, so I’m staying home today.
• Yorgunluk yüzünden bugün evde kalıyorum. = Because of tiredness, I’m staying home today.

Both are natural, but the structure is different.

Yüzünden is a postposition meaning because of, due to, or sometimes as a result of.

It usually follows a noun or noun phrase:

• yağmur yüzünden = because of the rain
• trafik yüzünden = because of traffic
• hastalık yüzünden = because of illness

A useful nuance: yüzünden often sounds a bit negative, like the cause is a problem, inconvenience, or unwanted reason.

So in this sentence, yorgunluk yüzünden suggests tiredness is the reason for staying home.

Because evde means at home / in the house, while eve means to the house / homeward.

• ev = house, home
• evde = in/at home (-de = locative case)
• eve = to home / to the house (-e = dative case)

In evde kalıyorum, the meaning is I am staying at home, so the location is where the action happens. That requires the locative:

• evde kalmak = to stay at home

If you said eve kalıyorum, that would sound wrong in standard Turkish.

Kalıyorum comes from kalmak, which often means to stay, to remain, or to be left.

Here:

• kal- = stay/remain
• -ıyor = present continuous / current habitual
• -um = I

So kalıyorum = I am staying or sometimes I stay depending on context.

In this sentence, the most natural translation is I’m staying home today.

In Turkish, the -iyor form is used more broadly than the English am/is/are ...-ing form.

Kalıyorum can mean:

• I am staying
• I’m staying today
• I stay in some contexts
• a present decision or near-current situation

So bugün evde kalıyorum naturally means I’m staying home today.

Turkish often uses -iyor for something that is currently true for today, this period, or as a present plan.

Yes, but it changes the feel slightly.

• Bugün evde kalıyorum. = I’m staying home today.
  This sounds like a current decision or present situation.
• Bugün evde kalacağım. = I will stay home today.
  This sounds a bit more like a future intention or plan.

Both can work, but kalıyorum is very natural when talking about what you’re doing today.

Because Turkish usually does not need subject pronouns when the verb ending already shows the person.

• kalıyorum already means I am staying
• the -um ending shows first person singular

So ben is optional:

• Yorgunluk yüzünden bugün evde kalıyorum. = normal, natural
• Ben yorgunluk yüzünden bugün evde kalıyorum. = possible, but more emphatic

Turkish often leaves out pronouns unless there is contrast, emphasis, or possible confusion.

Bugün means today.

It tells us when the speaker is staying home.

The sentence structure is:

• Yorgunluk yüzünden = because of tiredness
• bugün = today
• evde = at home
• kalıyorum = I’m staying

So the whole sentence means: Because of tiredness, I’m staying home today.

The word order can change, because Turkish is fairly flexible. The default tendency is to put the verb last, but other elements can move for emphasis.

These are all possible:

• Yorgunluk yüzünden bugün evde kalıyorum.
• Bugün yorgunluk yüzünden evde kalıyorum.
• Bugün evde yorgunluk yüzünden kalıyorum.
  This one is grammatically possible but less natural.

The most natural versions are usually the first two.

In Turkish, moving words often changes focus more than basic meaning.

Yes, it is a very common and natural expression.

• evde kalmak = to stay at home

Examples:

• Bugün evde kalıyorum. = I’m staying home today.
• Hafta sonu evde kaldım. = I stayed home over the weekend.
• Hasta olduğu için evde kaldı. = He/She stayed home because he/she was sick.

So in your sentence, evde kalıyorum should be understood as a normal everyday phrase.

Yes, but the structure changes slightly.

You can say:

• Yorgunluk yüzünden bugün evde kalıyorum.
• Yorgunluktan dolayı bugün evde kalıyorum.

Important difference:

• yüzünden usually comes directly after the noun:
  yorgunluk yüzünden
• dolayı usually follows the ablative form (-dan / -den / -tan / -ten):
  yorgunluktan dolayı

Both mean because of / due to.
Very generally:

• yüzünden often feels a bit more everyday and often slightly negative
• dolayı can sound a bit more formal or neutral

Yes. That would be another very natural way to express the reason.

• Yorulduğum için bugün evde kalıyorum.
• meaning: Because I’m tired / because I got tired, I’m staying home today.

This version focuses more directly on I and on the fact that I got tired / I am tired.

Compare:

• Yorgunluk yüzünden = because of tiredness
• Yorulduğum için = because I got tired / because I’m tired

Both are correct; they just package the reason differently.

A very literal breakdown is:

• yorgunluk = tiredness
• yüzünden = because of
• bugün = today
• evde = at home
• kalıyorum = I am staying

So literally:

Because of tiredness, today at home I am staying.

Natural English:

Because of tiredness, I’m staying home today.