The term 'Refuge in a Deluge' can be solved by the three-letter word 'ARK'. An ARK is a large boat or vessel that is used to protect people and animals from a flood. It is most famously associated with the biblical story of Noah, who built an ARK to save himself and two of every animal from a great flood sent by God. The term 'Refuge in a Deluge' is often used to refer to a safe haven in times of trouble or danger.