IPA: /ˈkæʃbʊk/
KK: /ˈkæʃbʊk/
A book used to record all money that comes in and goes out, including cash receipts and payments.
The accountant updated the cashbook to reflect the latest transactions.
Cashbook → It is formed from "cash" (from Middle French *caisse*, meaning a box or money) and "book" (from Old English *bōc*, meaning a written work or record). A cashbook is a record or book that keeps track of cash transactions.
Think of a 'box' for money ('cash') and a 'written record' ('book') — that's what a cashbook is, a record of cash transactions.