Teyzem acele ettiği halde marulu ve dereotunu özenle hazırladı.

Teyzem means my aunt.

The ending -m is the 1st person singular possessive suffix, so:

• teyze = aunt
• teyzem = my aunt

In Turkish, family words very often take possessive endings like this:

• annem = my mother
• ablam = my older sister
• dayım = my maternal uncle

So Teyzem is a very natural way to say my aunt without needing a separate word for my.

Acele ettiği halde means although she was in a hurry or even though she was hurrying.

The key pattern is:

• -DIğI halde = although / even though

So here:

• acele etmek = to hurry, to be in a hurry
• acele ettiği halde = although she was in a hurry

A very literal way to think of halde is in the state/condition that..., but in normal English you usually translate the whole expression as although or even though.

This structure shows contrast: she was in a hurry, but despite that, she prepared the lettuce and dill carefully.

Ettiği comes from etmek.

Here it is a subordinate-clause form built with the -DIK participle plus a possessive ending:

• et-
• -tik / -dik type ending
• -i = 3rd person singular possessive/agreement ending

So:

• ettiğim = that I did / that I was doing
• ettiğin = that you did / that you were doing
• ettiği = that he/she did / that he/she was doing

In this sentence, it helps form the clause acele ettiği halde.

There is also a sound change here:

• et + dik becomes ettik
• then k softens to ğ before a vowel
• so you get ettiği

This is why it is ettiği, not something simpler like etdiği.

Because Turkish often leaves the subject unstated when it is already clear from context.

Here, the main subject is teyzem. That same subject is understood in the subordinate clause too:

• Teyzem ... hazırladı = My aunt prepared ...
• acele ettiği halde = although she was in a hurry

So Turkish does not need to repeat o or another subject word.

Also, the form ettiği already shows 3rd person agreement inside the clause.

They are direct objects, and here they are being treated as specific/definite ones, so Turkish uses the accusative.

• marul → marulu
• dereotu → dereotunu

This is a very common Turkish pattern:

• elma = apple
• elmayı = the apple / a specific apple

So in this sentence, the aunt is not just preparing some lettuce and some dill in a vague sense; she is preparing the/specific lettuce and dill.

The vowel in the suffix changes by vowel harmony:

• marul ends with the vowel u, so the accusative is -u
• dereotu also ends with u, so the accusative is -nu here

Because dereotu is not a simple noun like marul.

Dereotu is a compound noun meaning dill. Historically it contains a built-in 3rd person possessive form:

• dere
• otu = its herb/grass

Because of that, when you add another suffix such as the accusative, Turkish uses a buffer -n-:

• dereotu
  • accusative → dereotunu

Compare:

• marul → marulu
• dereotu → dereotunu

This same thing happens with many compound nouns:

• kapı kolu → kapı kolunu
• oturma odası → oturma odasını

So dereotunu looks longer because the noun itself already contains compound structure.

Özenle means carefully, with care, or attentively.

It comes from:

• özen = care, attention
• -le = with

So literally it is something like with care.

That is why it functions like an adverb in English:

• özenle hazırladı = prepared carefully

You could think of it as similar to:

• dikkatle = carefully, with attention

Hazırladı is the simple past in Turkish, often called the -DI past.

It means:

• he/she prepared
• with teyzem as the subject: my aunt prepared

The verb is:

• hazırlamak = to prepare

So:

• hazırla- = verb stem
• -dı = past tense
• 3rd person singular has no extra personal ending here

That is why hazırladı means she prepared.

The sentence uses a very normal Turkish word order:

• Teyzem = subject
• acele ettiği halde = subordinate clause
• marulu ve dereotunu = objects
• özenle = adverb
• hazırladı = verb

Turkish is flexible, but the verb usually stays at the end.

So this sentence is natural as written. You can move some parts for emphasis, but the focus changes. For example:

• Teyzem marulu ve dereotunu acele ettiği halde özenle hazırladı.
• Marulu ve dereotunu teyzem acele ettiği halde özenle hazırladı.

These are possible, but the original version is straightforward and neutral.

It can imply more than a very narrow English prepare.

With food items like lettuce and dill, hazırlamak may include things like:

• washing
• sorting
• trimming
• chopping
• getting them ready to use or serve

So depending on context, hazırladı can mean prepared, but the real action may be something like got the lettuce and dill ready carefully.

That is very common in Turkish: one verb can cover a slightly wider practical meaning than the nearest English word.