Zincir yağı zincir baklasına sürüldü.

Because zincir yağı is a Turkish noun compound meaning chain oil.

In this kind of compound:

• the first noun describes the second noun
• the second noun usually takes a 3rd person possessive ending

So:

• zincir = chain
• yağ = oil
• yağı = its oil / oil of _

Together, zincir yağı means chain oil or oil for a chain.

This is very common in Turkish:

• araba kapısı = car door
• okul bahçesi = school garden
• zeytinyağı = olive oil

So yağı here does not necessarily mean a literal possession like the chain’s own oil. It is just the normal form used in this type of compound.

Because there are actually two separate noun compounds:

• zincir yağı = chain oil
• zincir baklası = chain link

English often avoids repetition more than Turkish does, but Turkish is perfectly natural here. Each compound is built independently, so zincir appears twice.

If you tried to avoid the repetition, the sentence might become unclear or sound less natural.

Because baklasına contains more than one ending.

Start with the compound:

• zincir baklası = chain link

Here baklası is the compound form of bakla.

Then Turkish adds the dative case ending, because the oil is applied to the chain link:

• baklası
  • -na → baklasına

So the structure is:

• bakla = link
• baklası = chain link
• baklasına = to the chain link

The reason it is -na rather than just -a is that the word already has a possessive ending, so Turkish uses a buffer n before the case ending.

It can be broken down like this:

• bakla = link
• -sı = compound/3rd person possessive ending
• -na = dative case with buffer n

So:

• bakla
• bakla-sı
• bakla-sı-na

This is a very common pattern in Turkish when a noun already has a possessive ending and then takes a case ending:

• kapısı = its door / door of the building
• kapısına = to its door / to the door

Sürüldü is the verb, and it is in the passive past tense.

It comes from sürmek, which can mean things like:

• to spread
• to smear
• to apply
• to rub on

Here the relevant meaning is to apply/spread.

The form breaks down like this:

• sür- = verb root
• -ül- = passive
• -dü = past tense

So sürüldü means:

• was applied
• was spread
• was rubbed onto

depending on context.

In this sentence, was applied is the most natural English equivalent.

The passive is used because the sentence focuses on what happened to the oil, not on who did it.

So instead of saying:

• Someone applied the chain oil to the chain link

Turkish says:

• The chain oil was applied to the chain link

This is very normal in Turkish, especially when:

• the agent is unknown
• the agent is unimportant
• the speaker wants a more impersonal style

Yes. An active version would include the person or thing doing the action.

For example:

• Biri zincir yağını zincir baklasına sürdü. = Someone applied the chain oil to the chain link.

Here:

• biri = someone
• zincir yağını = the chain oil, as a direct object
• sürdü = applied

Notice that in the active sentence, zincir yağı becomes zincir yağını because it is now the direct object.

Because in this sentence it is the subject of a passive verb, not the direct object of an active verb.

Compare:

Passive:

• Zincir yağı zincir baklasına sürüldü.
• The oil is the thing being talked about, so it is the grammatical subject.

Active:

• Biri zincir yağını zincir baklasına sürdü.
• Here the oil is the direct object, so it takes the accusative: yağını.

This is an important difference between active and passive structures in Turkish.

Yes, bakla often means broad bean/fava bean, but it also has other meanings depending on context.

In mechanical or chain-related contexts, bakla can mean:

• a link
• a loop
• one section of a chain

So zincir baklası means chain link.

This is a good example of how Turkish words can have multiple meanings, just like English words do.

Because Turkish does not have definite and indefinite articles in the same way English does.

There is no direct equivalent of the in ordinary noun phrases, and a/an is only sometimes expressed with bir.

So Turkish often leaves this to context.

For example:

• zincir yağı could mean chain oil, the chain oil, or some chain oil
• zincir baklasına could mean to the chain link or to a chain link

The exact English choice depends on context and the intended meaning.

The given order is very natural, but Turkish word order is more flexible than English.

The neutral order here is:

• Zincir yağı = topic/subject
• zincir baklasına = destination/target
• sürüldü = verb

So the default pattern is basically:

• subject + complement + verb

Because Turkish normally puts the verb at the end, sürüldü naturally comes last.

Other word orders are possible for emphasis, but the original sentence is the most straightforward and neutral.

This is a very useful question.

Zincir yağı is a compound, meaning something like:

• chain oil
• oil for a chain

It names a type or function.

Zincirin yağı uses the genitive + possessive pattern:

• zincirin = of the chain
• yağı = its oil

So zincirin yağı means more literally:

• the chain’s oil
• the oil of the chain

That sounds more like a specific relationship, not just a compound label.

So:

• zincir yağı = chain oil
• zincirin yağı = the oil of the chain

Yes:

• zincir = chain
• yağ-ı = oil, in compound form

• zincir yağ-ı = chain oil

• zincir = chain
• bakla-sı = link, in compound form
• bakla-sı-na = to the chain link

• zincir bakla-sı-na = to the chain link

• sür-ül-dü

  • sür- = apply/spread
  • -ül- = passive
  • -dü = past tense

So the sentence is structurally:

• [Chain oil] [to the chain link] [was applied].

Yes.

Turkish suffixes change form to match the vowels in the word.

For example:

• yağ → yağı
• bakla → baklası → baklasına
• sür → sürüldü

The exact vowel in each suffix depends on the vowels in the stem, according to Turkish vowel harmony rules.

A learner does not need to calculate every form perfectly at first, but it helps to notice that these are not random changes. Turkish suffixes regularly adapt to the word they attach to.