Galiba bugün evde kalacağım.

Galiba adds uncertainty or tentativeness. It is often translated as I guess, I think, probably, or apparently, depending on context.

In Galiba bugün evde kalacağım, it suggests something like:

• I guess I’ll stay home today
• I think I’ll stay home today
• I’ll probably stay home today

So the speaker is not stating it as a firm decision. They are leaning that way, but not 100% strongly.

Turkish often drops subject pronouns when they are already clear from the verb ending.

Here, kalacağım means I will stay, because the ending -ım shows first person singular.

So:

• kalacağım = I will stay
• ben kalacağım = I will stay too, but with extra emphasis on I

You could say Ben galiba bugün evde kalacağım, but ben is unnecessary unless you want contrast or emphasis.

Evde comes from:

• ev = house / home
• -de = the locative suffix, meaning in / at / on

So evde means at home or in the house.

Turkish usually uses suffixes where English uses separate prepositions.
So instead of saying at home with a separate word like at, Turkish says ev-de.

This is because of vowel harmony.

The locative suffix has forms like:

• -de / -da
• -te / -ta

The choice depends on:

1. the last vowel of the word
2. whether the final consonant is voiced or voiceless

For ev:

• the vowel is e, so we use the front-vowel version: -de
• the final consonant v is voiced, so we use d, not t

So:

• ev + de = evde

Kalacağım can be broken down like this:

• kal- = verb stem, stay / remain
• -acak / -ecek = future tense suffix, will
• -ım / -im / -um / -üm = I

So the basic structure is:

• kal-acak-ım = I will stay

But in actual spelling and pronunciation, it becomes kalacağım.

So the full sense is: I will stay.

This is a very common Turkish sound change.

The future suffix is -acak / -ecek. When a personal ending beginning with a vowel is added, the k in that suffix often softens to ğ.

So:

• kalacak + ım
• becomes kalacağım

This happens in many forms:

• yapacağım = I will do
• gideceğim = I will go
• bakacağım = I will look

Also, Turkish spelling reflects this change, so you actually write kalacağım, not kalacakım.

Kalmak basically means to stay or to remain.

In this sentence, evde kalmak means to stay at home.

Depending on context, kalmak can also mean things like:

• remain
• be left
• be stuck
• spend the night / stay somewhere

But with evde, the natural meaning is simply stay home.

Because bugün is already a time adverb, meaning today.

Time words in Turkish often appear without extra case marking when they function as simple adverbs:

• bugün = today
• yarın = tomorrow
• dün = yesterday

So bugün here simply tells us when the action will happen.

Turkish word order is fairly flexible, although the verb often comes at the end.

The neutral order here is:

• Galiba bugün evde kalacağım.

But you could also hear:

• Bugün galiba evde kalacağım.
• Bugün evde galiba kalacağım.
• Evde kalacağım galiba.

These versions can shift the focus slightly, but they still mean roughly the same thing.

The most natural, neutral pattern is usually:

• uncertainty/time/place + verb

And in Turkish, the verb at the end is very common.

They are often very close, and in many everyday situations they can both mean I think / I guess / probably.

For example:

• Galiba bugün evde kalacağım.
• Sanırım bugün evde kalacağım.

Both are natural.

A rough difference:

• galiba can sound a bit more like apparently / it seems / probably
• sanırım feels a bit more like I think / I suppose

But in normal conversation, the distinction is often small.

Yes. In natural English, both are fine.

The Turkish phrase evde kalmak literally means to stay at home / in the house, but in many contexts the best English translation is simply:

• I guess I’ll stay home today

That is usually the most natural everyday English version.

A rough pronunciation guide is:

gah-lee-bah byu-goon ev-deh kah-lah-jah-um

A few helpful notes:

• g is always hard, like in go
• ü is like the German ü or the French u
• c in Turkish sounds like English j
• ğ is usually very soft; it often lengthens the vowel before it rather than sounding like a strong consonant

So kalacağım is not pronounced with a strong g sound in the middle. The ğ is quite soft.

In Turkish, the future tense can be used for a plan, intention, prediction, or decision, just like will in English.

So kalacağım does not have to mean a distant future. It can mean a decision about later today.

That is why Bugün evde kalacağım is perfectly natural:

• Today I’ll stay home
• I’m going to stay home today
• I’ll be staying home today

The exact English version depends on style, but the Turkish future works well here.