"Limitrophe" is not a new word. It is an old word. But it was new to me when I encountered it a few days ago. It means "situated on a border or frontier."
I must have encountered it previously but it made no impression on me the first time. It is found in Churchill's war memoirs, the first volume, "The Gathering Storm" and it comes in a memo he gave to the war Cabinet on September 25, 1939. He wrote: "The Russians have mobilized very large forces and have shown themselves able to advance fast and far from their pre-war positions. They are now limitrophe with Germany, and it is quite impossible for Germany to denude the Eastern Front."
This is a very useful word and it is not surprising to discover it in something Churchill wrote. He is the one statesman I can think of who won a Nobel Prize for literature. When I finsihed my book and completed my duties regarding last month's Rerum Novarum conference, I permitted myself an indulgence to celebrate. I took up the memoirs to re-read them for my bedtime reading. Sometimes, I am sleepy and only consume a few pages. Other nights, I can't put them down.