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to overcome (opposition); to push past; to force one's way
to press and cut
部長の反対を押しきって企画を通した。
I pushed past the department head's opposition and got the project approved.
困難を押しきって計画を最後まで遂行した。
We pushed through the difficulties and carried out the plan to the end.
多数決で反対派を押しきる形で可決された。
It was passed by majority vote, overriding the opposition.