adverb

Usually written with kana alone.
  1. how, in what way, by what means.
  2. why, for what reason, for what purpose, what for.
  3. cannot possibly.

interjection

Usually written with kana alone. Often as どうして、どうして.
  1. no way.

Variations

Pronunciation Kanji Kana Is Common
 
 
 
 
どうして
如何
 
 
如何して どうして