The kanji 借借 primarily means "to borrow" or "to lend." It signifies the act of temporarily receiving something (money, an object, etc.) from someone with the expectation of returning it later. It also encompasses the act of lending something to another person. It implies a transfer of possession or use, not permanent ownership.

・On-yomi (音読み): シャク (shaku) ・Kun-yomi (訓読み): か（り）る (kariru) - to borrow; か（す） (kasu) - to lend

⚫︎ 借金 (shakkin) Translation: Debt; loan ⚫︎ 借りる (kariru) Translation: To borrow ⚫︎ 貸す (kasu) Translation: To lend

The kanji 借借 is a phono-semantic compound (形声文字). ⚫︎ It is composed of the semantic component 亻 (ninben, "person" or "human") on the left side. ⚫︎ And the phonetic component 昔 (seki), which indicates the sound and also implies the idea of "past" or "before". ⚫︎ The combination suggests that borrowing involves something that has been possessed *before* by the person lending it, or a temporary transaction between people.