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The Japanese word

変革

is pronounced
henkaku | へんかく
means
reform, revolution, upheaval, (the) Reformation
Examples:
電話機の発明は我々の生活に変革をもたらした。
denwaki no hatsumei wa wareware no seikatsu ni henkaku o motarashi ta.
The invention of the telephone caused a revolution in our way of living.
電話の発明は我々の生活に大変革をもたらした。
denwa no hatsumei wa wareware no seikatsu ni dai henkaku o motarashi ta.
The invention of the telephone caused a revolution in our way of living.
意味のある変革がなされるならば、私は政治改革に総じて賛成だ。
imi no aru henkaku ga nasa reru nara ba, watashi wa seiji kaikaku ni sōjite sansei da.
In the main, I am in favor of political reform if meaningful changes are made.
Examples sourced from tatoeba.org