to return money that you borrowed
借りたお金を返すこと (karita okane o kaesu koto)
"I will pay back the money I borrowed from you next week."
"来週、あなたから借りたお金を返します。" (raishū, anata kara karita okane o kaeshimasu)
to become part of a group or culture naturally
to add something extra for free; to include casually
to take a short break or leave temporarily from work
to reinvest profits into the same business
to spend time lazily doing nothing
to remove obstacles between people or groups