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to collect; to put (it all) together; to integrate; to consolidate; to unify
to summarize; to aggregate
to bring to a conclusion; to finalize; to settle; to put in order
to establish; to decide
彼は調査した資料を一冊にまとめた。
He compiled the research materials into a single volume.
会議で出た意見をまとめて発表した。
I summarized opinions and presented them.
チームをまとめるのは大変だ。
It's hard to bring the team together.