Meaning of だいへんか in Japanese

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Definition of だいへんか

だいへんか(daihenka) 【大変化】

だいへんかく(daihenkaku) 【大変革】

(n) revolution; cataclysm; drastic change
電話の発明は我々の生活に大変革をもたらした。
The invention of the telephone caused a revolution in our way of living.