Kız kardeşim etek giymeyi seviyor, ama ben sahilde yürürken şortla daha rahat ediyorum.

Because kız kardeş means sister literally, and the ending -im / -ım / -um / -üm is the 1st person singular possessive suffix, meaning my.

So:

• kız kardeş = sister
• kız kardeşim = my sister

This is very common in Turkish: instead of using a separate word for my, Turkish often adds a possessive ending directly to the noun.

Examples:

• annem = my mother
• arkadaşım = my friend
• evim = my house

Because the verb sevmek normally takes its object in a noun-like form, and when another verb is used as that object, Turkish usually turns it into a verbal noun and marks it with the accusative.

So:

• giymek = to wear
• giymeyi = wearing / to wear, as the object of sevmek

Structure:

• etek giymeyi seviyor = she likes wearing skirts

This is a very common pattern:

• kitap okumayı seviyorum = I like reading books
• yüzmeyi seviyor = he/she likes swimming
• Türkçe öğrenmeyi seviyorum = I like learning Turkish

Giymeyi can be broken down like this:

• giy- = wear
• -me = verbal noun marker
• -y- = buffer consonant
• -i = accusative ending

So:

• giymek = to wear
• giyme = wearing
• giymeyi = the wearing, as a specific object

The y appears because Turkish often inserts a buffer consonant between two vowels.

This kind of form is very common after verbs like:

• sevmek = to like
• istemek = to want
• bilmek = to know
• tercih etmek = to prefer

Yes. In Turkish, the present continuous form very often covers meanings that English might express with either is ...ing or the simple present.

So seviyor here means:

• she likes not necessarily
• she is liking

Likewise:

• ben sahilde yürürken şortla daha rahat ediyorum means a general personal preference, not only something happening at this exact second.

This is very normal in Turkish. The -yor form is extremely common for:

• current actions
• repeated actions
• habits
• general personal tendencies

Sahil means beach or seaside, and -de / -da is the locative suffix, meaning in, at, on depending on context.

So:

• sahil = beach
• sahilde = on the beach / at the beach

The form is -de here because of vowel harmony and consonant choice.

Other examples:

• evde = at home
• okulda = at school
• masada = on the table

In this sentence, sahilde yürürken means while walking on the beach.

Yürürken means while walking.

It comes from:

• yürümek = to walk
• yürür = walks / is walking / would walk, based on the aorist stem
• -ken = while, when

So:

• yürürken = while walking

This form is used to describe something happening at the same time as another action or state.

Examples:

• yemek yerken televizyon izliyorum = I watch TV while eating
• eve giderken onu gördüm = I saw him/her while going home
• çalışırken müzik dinlerim = I listen to music while working

Because -la / -le can mean with or sometimes in/by means of, depending on context.

So:

• şort = shorts
• şortla = with shorts / in shorts

In this sentence, şortla daha rahat ediyorum means something like:

• I feel more comfortable in shorts

Turkish often uses -la / -le where English might use in for clothing.

Similar examples:

• elbiseyle güzel görünüyor = she looks nice in a dress
• gözlükle okuyorum = I read with glasses / wearing glasses
• arabayla gidiyorum = I’m going by car

Rahat etmek is a common expression meaning:

• to feel comfortable
• to be at ease
• to manage comfortably

So:

• daha rahat ediyorum = I feel more comfortable / I’m more comfortable

You could sometimes say rahatım, but rahat etmek often sounds more natural when talking about comfort in a situation or while doing something.

Compare:

• rahatım = I am comfortable
• rahat ediyorum = I feel comfortable / I’m doing fine comfortably in this situation

Here, şortla daha rahat ediyorum emphasizes personal comfort while walking on the beach.

Daha means more.

So:

• rahat = comfortable
• daha rahat = more comfortable

In the sentence:

• şortla daha rahat ediyorum = I feel more comfortable in shorts

This creates a comparison, even if the thing being compared is only implied. The implied comparison is probably:

• more comfortable than wearing a skirt or
• more comfortable that way

Examples:

• daha iyi = better
• daha güzel = more beautiful
• daha hızlı = faster

Yes, ben could be omitted, because Turkish verb endings already show the subject.

• ediyorum already tells you the subject is I

So these are both possible:

• ama ben sahilde yürürken şortla daha rahat ediyorum
• ama sahilde yürürken şortla daha rahat ediyorum

Why include ben then? Usually for contrast or emphasis.

Here, the sentence contrasts:

• my sister likes wearing skirts
• but I feel more comfortable in shorts

So ben helps highlight that contrast.

No, Turkish word order is flexible, although there are more natural and less natural choices.

The original sentence is very natural:

• Kız kardeşim etek giymeyi seviyor, ama ben sahilde yürürken şortla daha rahat ediyorum.

Why it works well:

• topic first: Kız kardeşim
• object before verb: etek giymeyi
• contrast marker: ama
• time/place details before the main verb: sahilde yürürken
• main predicate at the end: daha rahat ediyorum

Turkish often places the main verb at the end, and things like place, time, and manner usually come before it.

Not usually in natural English. A more natural translation is:

• while walking on the beach or
• when I walk on the beach, depending on context

Turkish -ken forms are often best translated with:

• while ...ing
• when ...
• as ...

So sahilde yürürken is best understood as a background action or situation:

• while walking on the beach

Because ama means but, and the sentence joins two contrasting clauses:

• Kız kardeşim etek giymeyi seviyor
• ama ben sahilde yürürken şortla daha rahat ediyorum

The comma helps separate the two ideas clearly. In Turkish writing, this is normal and natural in longer sentences with contrast.

Turkish often distinguishes between:

• erkek kardeş = brother
• kız kardeş = sister

The basic word kardeş means sibling and does not itself specify male or female.

So:

• kardeşim = my sibling, or sometimes my brother/sister depending on context
• kız kardeşim = my sister
• erkek kardeşim = my brother

This is useful because Turkish can be more explicit when needed.

A very useful way to study the sentence is in chunks:

• kız kardeşim = my sister
• etek giymeyi sevmek = to like wearing skirts
• sahilde yürürken = while walking on the beach
• şortla rahat etmek = to feel comfortable in shorts
• daha rahat etmek = to feel more comfortable

If you learn these as ready-made patterns, you can build similar sentences easily:

• Abim takım elbise giymeyi seviyor. = My older brother likes wearing suits.
• Ben evde çalışırken daha rahat ediyorum. = I feel more comfortable while working at home.
• O spor ayakkabıyla daha rahat ediyor. = He/She feels more comfortable in sneakers.