どんなに

adverb

how; how much; to what extent

Used in exclamatory or interrogative contexts to express degree or extent, often with an emotional nuance.

• どんなに嬉うれしかったか、言こと葉ばにできない。

  I can't put into words how happy I was.

• どんなに待まっても彼かれは来こなかった。

  No matter how long I waited, he didn't come.

adverb

no matter how (much); however

Used in concessive patterns with ても/でも to mean 'no matter how much' or 'even if'. Often followed by a verb or adjective in the ても form.

• どんなに忙いそがしくても、運うん動どうする時じ間かんは作つくるべきだ。

  No matter how busy you are, you should make time to exercise.

• どんなに高たかくても、彼かれはその車くるまを買かうだろう。

  However expensive it is, he will probably buy that car.