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I came across this on Twitter, it seems to be mostly a question but sometimes
an exclamation. Is it とは, or maybe とか? How do you use it? My dictionary has a
とな as word that come at the end of a sentence to get confirmation. Is this the
same?

[画像も貼らずにスレたてとな？](https://twitter.com/sosei920/status/78955392306122752)  
[今日は次第に雨とな。](https://twitter.com/ookumaneko_mdk/status/78943263511412736)  
[千葉東方沖震度4とな？](https://twitter.com/momijiya/status/78930304471007232)  
[むっちゃんがイケメン店員とな(￣□￣)!?](https://twitter.com/bnnseven/status/78950641476714496)

The avatars of people using it are [overwhelmingly
cute](https://twitter.com/#search?q=%E3%81%A8%E3%81%AA). Is this a cute word.
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2011-06-09T23:12:36.120
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2011-06-12T13:12:35.557
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question
usage vocabulary colloquial-language definitions
What does とな mean (and how do I use it)?
とな is basically formed by combination of と and な.

You may use ～とな at the end of the sentenses like that, basically use when you
heard it from somewhere else and also express your agreement when you repeat
that. It has similar meaning with ～というのだね.

You may also use ～とな at the end of the phrase (even in the middle of
sentence), and it express light emphasis for your agreement.

ref:

  * [http://www.weblio.jp/content/とな](http://www.weblio.jp/content/%E3%81%A8%E3%81%AA) 「大辞林」
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2011-06-10T04:35:59.663
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2011-06-10T07:23:38.523
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answer
As YOU wrote, とな in these examples is a combination of the particle と
signifying quotation and the particle な signifies that the speaker wants reply
or agreement or wants to make sure. I think that とな in this meaning is rare in
the modern Japanese except as an Internet slang or possibly in some dialects.

“画像も貼らずにスレ立てとな!?” is a set phrase used in some Internet forums including
[2channel](http://en.wikipedia.org/wiki/2channel). It means something similar
to “You started a new thread (in the forum) without even including a single
image in it? Seriously?” I guess that many of the uses of “とな!?” (or “とな?”)
are inspired by this set phrase.
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2011-06-12T01:24:28.777
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answer