Dayım mayonez sevmez, ama amcam havuç salatasına biraz mayonez koyar.

Turkish distinguishes between different kinds of uncles:

• dayı = your mother’s brother
• amca = your father’s brother

English usually just says uncle, so this is something English speakers often notice right away.

So:

• dayım = my maternal uncle
• amcam = my paternal uncle

That -m means my.

In Turkish, possession is usually shown with a suffix attached to the noun:

• dayı → dayım = my uncle
• amca → amcam = my uncle

With family words, Turkish often uses this possessive form very naturally. You can also say:

• benim dayım
• benim amcam

But benim is often omitted because the -m already tells you it means my.

Because mayonez here is a general, non-specific object.

Turkish often leaves the direct object without the accusative ending when it is indefinite or generic:

• mayonez sevmez = he doesn’t like mayonnaise / he doesn’t like mayonnaise in general

If you said:

• mayonezi sevmez

that would sound more like he doesn’t like the mayonnaise or that specific mayonnaise.

So the lack of -i helps show that this is a broad statement, not about one particular mayonnaise.

Havuç salatası is a very common Turkish noun-compound pattern.

In this pattern:

• the first noun describes the type
• the second noun takes a special ending

So:

• havuç = carrot
• salata = salad
• havuç salatası = carrot salad

This is called an indefinite noun compound. You will see this pattern a lot in Turkish:

• elma suyu = apple juice
• domates çorbası = tomato soup
• yaz tatili = summer vacation

So havuç salatası is the normal Turkish way to say carrot salad.

Because the phrase needs the dative case, which often means to or into in English.

Here, the uncle is putting mayonnaise into the carrot salad, so Turkish uses the dative:

• havuç salatası = carrot salad
• havuç salatasına = into/to the carrot salad

The ending looks like -na here because salatası already contains a possessive-type ending, and Turkish inserts a buffer n before the case ending.

So:

• salatası
  • -a → salatasına

This is completely normal Turkish morphology.

These are in the aorist, which is often used for:

• habits
• general truths
• things someone typically does
• likes and dislikes

So:

• Dayım mayonez sevmez = My uncle doesn’t like mayonnaise / doesn’t generally like mayonnaise
• amcam ... mayonez koyar = my other uncle puts mayonnaise ... / tends to put mayonnaise ...

In English, this often corresponds to the simple present.

So this sentence is not describing one specific moment right now; it describes a usual preference or habit.

It breaks down like this:

• sev- = like, love
• -me- = negative marker
• -z = third person singular aorist ending

So:

• sevmez = he/she does not like

Compare:

• sever = he/she likes
• sevmez = he/she doesn’t like

This is a very useful pattern:

• koyar = he/she puts
• koymaz = he/she doesn’t put

Biraz means a little, a bit, or some.

So:

• biraz mayonez = a little mayonnaise / some mayonnaise

It comes before the noun, just like many quantity words in English:

• biraz su = a little water
• biraz ekmek = a little bread / some bread

Because mayonez is an uncountable substance here, biraz is a very natural choice.

Because Turkish is normally a verb-final language.

A very common basic order is:

• Subject + Object + Verb

So:

• Dayım mayonez sevmez
• amcam havuç salatasına biraz mayonez koyar

This can feel different to English speakers, because English usually puts the verb earlier.

Turkish word order is somewhat flexible, but putting the verb at the end is the most neutral and standard pattern.

Ama means but.

It connects the two contrasting ideas:

• Dayım mayonez sevmez = My uncle doesn’t like mayonnaise
• ama amcam ... mayonez koyar = but my other uncle puts mayonnaise ...

So ama works very much like English but. It marks a contrast between the two uncles’ habits or preferences.