Turkish Vowel Harmony — Simple Examples
I was talking about Turkish vowel harmony with some Turkish friends recently and was surprised when they didn’t know what I was talking about.
To be clear, they’re Turkish Australian friends who grew up speaking Turkish at home without necessarily studying its grammar. They can use vowel harmony perfectly well. They just didn’t have a label for the thing they were doing. I find that fascinating.
Vowel harmony is rather unusual if English is your first language, although it isn’t confined to just a handful of languages. In Turkish, the vowels of many grammatical endings change to fit the word they’re attached to. It works alongside conjugation, possession and cases; it isn’t a separate tense or a kind of adjective agreement.
In broad terms, vowels keep related tongue positions and lip shapes, so speakers don’t have to move between quite such different sounds. That’s a helpful picture, not a claim that your mouth stays in exactly the same shape. Here are some straightforward, everyday examples you can try on your Turkish-speaking friends, even if they don’t recognise the name for the rule.
Contents
The two kinds of Turkish vowel harmony
Turkish has eight written vowels: a, e, ı, i, o, ö, u, ü. The dotless ı and dotted i stand for different sounds.
There are two main patterns. Both normally follow the last vowel before an ending — not necessarily the final letter of the word.
| Kind of harmony | Ending vowels | Quick example |
|---|---|---|
| Two-way (A-type) | a or e | Evler. (Houses) / Arabalar. (Cars) |
| Four-way (I-type) | ı, i, u or ü | İyiyim. (I’m well) / Yorgunum. (I’m tired) |
In both cases, the suffix keeps the same job. Only its vowel changes. For the fuller grammar, I also have a guide to Turkish vowel harmony explained simply; here I’ll concentrate on short phrases that make the sound pattern obvious.
Two-way vowel harmony: the easy one
Two-way vowel harmony chooses e after the front vowels e, i, ö, ü, and a after the back vowels a, ı, o, u. That’s the whole vowel rule.
| Last vowel before the suffix | Choose | Example |
|---|---|---|
| e, i, ö, ü | e | Evler — houses |
| a, ı, o, u | a | Arabalar — cars |
The plural ending is -ler or -lar. So ev (house) becomes evler, but araba (car) becomes arabalar. Try göz (eye) → gözler (eyes), and okul (school) → okullar (schools).
You also hear it in location endings: evde (at home) but okulda (at school). At times the consonant changes as well — parkta (at the park) — for a different reason. That’s covered in my Turkish consonant harmony guide.
Four-way vowel harmony: the complete cheat sheet
Four-way harmony follows both whether the preceding vowel is front or back and whether it’s rounded or unrounded. That sounds technical. In practice, it’s just four pairs.
| Last vowel before the ending | Ending vowel | Sound group |
|---|---|---|
| e or i | i | front, unrounded |
| a or ı | ı | back, unrounded |
| o or u | u | back, rounded |
| ö or ü | ü | front, rounded |
Front/back roughly describes tongue position; rounded/unrounded describes whether you round your lips. You don’t need to know the phonetics to use the table. Just find the last vowel and match its row.
Four identical conversations: ‘Are you…?’ ‘I’m…’
These are my favourite examples because the structure is identical in each pair. You can hear all four vowel patterns without changing what kind of sentence you’re making.
| Four-way pattern | Question | Answer |
|---|---|---|
| i (e, i) | İyi misin? Are you well? | İyiyim. I’m well. |
| ı (a, ı) | Hazır mısın? Are you ready? | Hazırım. I’m ready. |
| u (o, u) | Yorgun musun? Are you tired? | Yorgunum. I’m tired. |
| ü (ö, ü) | Üzgün müsün? Are you sad? | Üzgünüm. I’m sad. |
Look at yorgun. The last vowel is u, so both the question particle mu and the first-person ending in yorgunum use u. With üzgün, the last vowel is ü, so you get mü and -üm. Same grammar, different vowel.
There’s a spelling detail to learn here. Turkish writes the question marker mi/mı/mu/mü separately, but attaches the personal ending to it: iyi misin, not iyi mi sin. Both vowels follow harmony. The Turkish Language Association confirms this spelling rule.
Other everyday examples: ‘my…’ and objects
Now listen for the same four vowels doing two different jobs: possession (my hand, my nose) and the ending that marks a particular direct object (the house, the milk).
| Pattern | ‘My…’ (-im/-ım/-um/-üm) | Object (-i/-ı/-u/-ü) |
|---|---|---|
| i | Elim ağrıyor. My hand hurts. | Evi temizle. Clean the house. |
| ı | Başım ağrıyor. My head hurts. | Kapıyı aç. Open the door. |
| u | Burnum tıkalı. My nose is blocked. | Telefonu ver. Give me the phone. |
| ü | Gözüm ağrıyor. My eye hurts. | Sütü iç. Drink the milk. |
Why kapıyı instead of kapıı? Turkish inserts a linking y between the final vowel of kapı (door) and the object ending -ı. That doesn’t change the harmony rule.
And why telefonu? The word telefon has several vowels, but its last vowel is o. That’s the one that normally determines the vowel of the ending.
Polite requests: mi, mı, mu and mü
You can also use four-way harmony to ask friends to do things. These requests have the same question marker from the examples above.
| Pattern | Turkish | English |
|---|---|---|
| i | Gelir misin? | Can you come? |
| ı | Bakar mısın? | Can you take a look? |
| u | Oturur musun? | Would you sit down? |
| ü | Bunu düşünür müsün? | Would you think about this? |
These use the informal singular ‘you’. For a polite request to a stranger, or when speaking to several people, use the corresponding -siniz/-sınız/-sunuz/-sünüz ending. For instance, Bakar mısınız? means ‘Could you take a look?’
Does vowel harmony work in every Turkish word?
In everyday Turkish, these rules are very dependable, but they have exceptions. Loanwords can have mixed vowel groups. Telefon is a familiar example, and it still takes -u in telefonu according to its last vowel. Some borrowed words and some fixed-vowel endings behave differently.
Words can also take several endings, with the two-way and four-way rules taking turns. In okul-lar-ımız-da (‘at our schools’), the plural ending gets a, ‘our’ gets ı, and the location ending gets a. Each ending has its own vowel pattern.
Vowel harmony is also different from consonant changes such as kitapta (in the book), where the location ending starts with t rather than d. And if you’re wondering why Turkish has all these endings in the first place, my overview of Turkish grammar explains how they fit together.
Which other languages have vowel harmony?
It’s far from unique to Turkish. Other Turkic languages, such as Kazakh, Kyrgyz and Azerbaijani, have related harmony patterns. In the Uralic family, Finnish and Hungarian have well-studied front/back vowel harmony. Mongolian has a different arrangement, and many West African languages and varieties — including Yoruba dialects — have harmony systems that often depend on tongue-root position.
You can see how these systems differ in John Goldsmith’s comparison of Mongolian, Yaka, Finnish and Hungarian and research on three Yoruba dialects. Their shared sound patterns don’t prove that all these languages have a common ancestor. Even the traditional ‘Altaic’ grouping is disputed: Juha Janhunen’s 2023 review discusses the separate language families and centuries of contact.
Where did vowel harmony come from, and how old is it?
Nobody can give vowel harmony a birthday. Languages change through how people actually speak, not by committees inventing grammar rules. One leading explanation starts with coarticulation: when you pronounce a vowel, it slightly influences nearby vowels. Over generations, that tendency can become a regular rule which children learn as part of their language.
Researchers study how that can happen, although they still debate the precise steps. For a linguistic explanation, see Amanda Rysling’s work on the phonetic origins of vowel harmony and Frédéric Mailhot’s model of harmony emerging through language learning.
In the Turkic languages, harmony is old. Written Old Turkic inscriptions from the eighth century CE already provide evidence of front/back vowel patterns. Scholars still debate details of the early vowel system, including how closely it resembled modern Turkish. A study of the Orkhon inscriptions explores some of those questions. The oldest surviving writing tells us the rule existed by then, not when people first began using it.
That’s what makes the conversation with my Turkish friends funny to me. I see a neat set of four rules. They just hear what sounds right.
An easy way to practise
Say the four ‘Are you…?’ pairs out loud, with the answer straight after each question. Then go from elim (my hand) to başım (my head), burnum (my nose) and gözüm (my eye). It’s the same grammatical idea each time.
If your goal is conversation rather than a grammar exam, start there. Then take a few sentences from the everyday Turkish phrases guide and see whether you can predict which suffix vowel they’ll use.
