大だい変へん革かく

noun

great reform; drastic change; revolution

Refers to a large-scale, fundamental transformation, often in social, political, or organizational contexts. Can imply upheaval or a sweeping overhaul.

• その政せい策さくは教きょう育いく制せい度どの大だい変へん革かくをもたらした。

  The policy brought about a drastic change in the education system.

• 産さん業ぎょう革かく命めいは社しゃ会かいの大だい変へん革かくだった。

  The Industrial Revolution was a great transformation of society.