The word "流水帐" is formed by combining the characters 流 (liú, meaning "to flow"), 水 (shuǐ, meaning "water"), and 帐 (zhàng, meaning "account" or "ledger"), where the first two characters together as 流水 (flowing water) metaphorically describe the sequential, uninterrupted nature of the entries in the 帐 (account), thus creating a term for a continuous, day-by-day record of transactions or events.