/riːˈmɔːɡɪdʒ/
[verb] To take out a new mortgage on a property that you already own, either to replace your current mortgage deal or to borrow more money against the value of your home.
The word 'mortgage' literally means 'death pledge' — a promise that dies either when the debt is paid or when the borrower fails to pay.
To understand 'remortgage', we must first dig into the dark heart of 'mortgage' itself, a word that carries one of the most dramatic meanings hiding in plain sight in the English language. It comes from Old French 'mortgage', which is built from two parts: 'mort', meaning dead, and 'gage', meaning pledge or security. So a mortgage, at its core, is a 'dead pledge' — and medieval lawyers were entirely deliberate about this grim label.
The Old French 'mort' traces back to Latin 'mortuus', the past participle of 'mori', meaning to die — the same root that gives us English words like 'mortal', 'mortuary', and 'murder'. The 'gage' element comes from a Frankish or Germanic source related to the idea of a security or wager, the same thread that runs through Old French 'gage' → English 'gauge', 'wage', and 'engage'. Together, these two parts formed a precise legal concept: an arrangement that is dead in one of two ways — either the debt is paid and the pledge dies, or the borrower defaults and the property is forfeited, killing the debtor's claim to it.
The word entered Middle English in the 14th century, appearing in legal texts concerned with land ownership and debt. The great English jurist Sir Edward Coke, writing in the early 17th century, explained the 'death pledge' interpretation explicitly, saying the arrangement was called a mortgage because if the debtor did not pay, the land was 'taken from him forever', and if he did pay, the pledge was 'dead' to the lender. Either way, something died. The word settled into English legal and financial language and never left.
The prefix 're-' is a straightforward borrowing from Latin 're-', meaning again or back — the same prefix found in hundreds of English words such as 'return', 'rebuild', and 'reconsider'. It was attached productively to 'mortgage' as property markets grew more complex and homeowners began to see the value of switching lenders or borrowing additional sums against rising property values. The compound 'remortgage' emerged naturally in modern financial English, particularly in British usage, to describe the act of entering into a new or additional mortgage arrangement on a property one already holds.
What makes 'remortgage' particularly interesting is how it layers a living, active prefix onto a word built from the concept of death. To 'remortgage' is, in a sense, to revive the death pledge — to breathe new life into a financial arrangement that had, in theory, been laid to rest. The word also reflects how dramatically the idea of homeownership has changed: in medieval England, defaulting on a mortgage could mean losing land that had been in a family for generations. Today, remortgaging is often a routine financial decision, prompted by falling interest rates or a desire to fund home improvements — a far cry from the existential dread embedded in the word's origins.