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to take off; to jump; to leap
to take the plunge; to decide; to embark on; to venture into; to launch out into
to step out of the ring
彼は転職を踏み切った。
He took the leap and changed jobs.
移住を踏み切っている最中だ。
I am in the process of taking the leap to relocate.
大きな決断に踏み切るには勇気がいる。
It takes courage to take the plunge on a major decision.