To borrow or take on a loan (often funds) from an outside source; to rent/charter in some contexts. Frequently used for borrowing money from banks or institutions.
新しい設備を買うために銀行から三百万円を借り入れた。
I took out a 3 million yen loan from the bank to buy new equipment.
小さな会社は運転資金を借り入れる必要があることが多い。
Small companies often need to borrow funds for working capital.
イベント用のバスを借り入れる手配をした。
We arranged to charter (rent) buses for the event.
個人で大きな金額を借り入れるときは返済計画をよく立てておくべきだ。
When an individual borrows a large sum, they should carefully plan repayment.