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The longest word in the Turkish Language is muvaffakiyetsizleştiricileştiriveremeyebileceklerimizdenmişsinizcesine which includes 70 letters. It means As though you are from those we may not be able to easily make a maker of unsuccessful ones.

History

In the past "Çekoslovakyalılaştıramadıklarımızdan mısınız?" which means "Are you one of those people whom we couldn't make resemble from Czechoslovakia?" was very popular and accepted as the longest word in Turkish. However, the question suffixes (mısınız in this case) are written separately, so though it is one word, it seems like two words when the word is written. Also, longer versions of this word could be made easily, such as "Çekoslovakyalılaştırabildiklerimizden miydiniz?". For these reasons, the word lost its popularity, but it is still a popular tongue-twister in Turkey.

After the dissolution of Czechoslovakia, Afyonkarahisarlılaştırabildiklerimizdenmişsinizcesine which is similar to the current one was popular for some time. It is a longer word and does not surprise people as it contains no spaces. It means "As if you are one of the people that we made resemble from Afyonkarahisar". After discovery of the longer word, it has lost its popularity.

Arguments

Technically in Turkish it is possible to make a word involving endless number of letters which is grammatically correct as Turkish is an agglutinative language. But, when the same suffix is used too many times, the word will be incomprehensible. Therefore, muvaffakiyetsizleştiricileştiriveremeyebileceklerimizdenmişsinizcesine is widely accepted as the longest word, because it is understandable for a Turkish-speaker and has use in the following situation:

Kötü amaçların güdüldüğü bir öğretmen okulundayız. Yetiştirilen öğretmenlere öğrencileri nasıl muvaffakiyetsizleştirecekleri öğretiliyor. Yani öğretmenler birer muvaffakiyetsizleştirici olarak yetiştiriliyorlar. Fakat öğretmenlerden biri muvaffakiyetsizleştirici olmayı, yani muvaffakiyetsizleştiricileştirilmeyi reddediyor, bu konuda ileri geri konuşuyor. Bütün öğretmenleri kolayca muvaffakiyetsizleştiricileştiriverebileceğini düşünen okul müdürü bu duruma sinirleniyor, ve söz konusu öğretmeni makamına çağırıp ona diyor ki: "Muvaffakiyetsizleştiricileştiriveremeyebileceklerimizdenmişsinizcesine laflar ediyormuşsunuz ha?"

We are in a teachers' training school which has evil purposes. How to make unsuccessful ones is being taught to the teachers who are being educated in that school. So teachers are educated as makers of unsuccessful ones. However one of those teachers refuses to be maker of unsuccessful ones which means made a maker unsuccessful ones. He talks about it and criticizes. The headmaster who thinks he can make one easily/quickly a maker of unsuccessful ones gets angry. He invites the teacher to his room and says "You are talking like you would be from those we cannot easily/quickly make a maker of unsuccessful ones, right?"

Word formation