Mektup is a written letter, not a letter of the alphabet. Follow a letter from a drawer into an envelope, naming its owner and its role in the sentence.

The idea

For this noun, final p becomes b before a vowel: mektubu, mektuba, mektubun, mektubum. The last vowel u gives rounded possessives such as mektubumuz. Before consonants, keep p: mektupta, mektuptan, mektuplar. For “our letters”, add the plural first: mektuplarımız; the possessive now follows the a in -lar.

Patterns to compare
Function or meaningTurkish form
Base: a lettermektup
Plural: lettersmektuplar
Accusative: the letter as objectmektubu
Dative: to the lettermektuba
Locative: in the lettermektupta
Ablative: from the lettermektuptan
Genitive: of the lettermektubun
Instrumental: with a lettermektupla
My lettermektubum
Your letter (one person)mektubun
His/her lettermektubu
Our lettermektubumuz
Your letter (plural or polite)mektubunuz
Their letter(s)mektupları
Our lettersmektuplarımız
His/her letter as objectonun mektubunu
In his/her letteronun mektubunda

Examples

Read-aloud uses a synthetic Turkish voice available on your device. Voice quality and availability vary; it does not assess your pronunciation.

Watch out

Mektubu okuyorum means “I am reading the letter”; it does not by itself mark an owner. In onun mektubu, the same final -u marks possession. To make that whole phrase the object, use onun mektubunu okuyorum: keep the possessive, add linking n, then the accusative -u.

Try it yourself

  1. Complete: I will send this letter today. Use the accusative.

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    mektubu

    mektubu: “this letter” is the specific thing being sent, so it takes the accusative. The vowel ending changes final p to b; there is no owner in this phrase.

  2. Complete: There are two addresses in this letter.

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    mektupta

    mektupta: the two addresses are in the letter. Final p stays because the locative begins with a consonant, and its voiceless sound calls for -ta.

  3. Complete with “our letters”: Our letters are in this box.

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    mektuplarımız

    mektuplarımız: the prompt requires several letters belonging to us. After -lar, the last vowel is a, so “our” is -ımız, not -umuz; p stays before l.

  4. Complete: My older sister is reading his/her letter. Keep possession and add the object ending.

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    mektubunu

    mektubunu: onun identifies the owner, so begin with mektubu. Reading takes this possessed letter as its specific object; add n and -u without deleting the possessive.

Use it today

Write three connected sentences about an imaginary letter: whose it is, what is in it, and who reads it. Then change “our letter” to “our letters” and check the possessive vowel.