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to undertake; to take on (task)
to assure; to guarantee; to vouch (for); to promise
彼は難しい修理を受け合った。
He undertook the difficult repair.
納期を受け合って、チームは残業した。
Having guaranteed the delivery date, the team worked overtime.
誰もその事業の成功を受け合うことはできない。
No one can guarantee the success of that venture.