limitrophe

adjective

lim·​i·​trophe ˈli-mə-ˌtrōf 

-ˌtrȯf

: situated on a border or frontier : adjacent

the area limitrophe to the river

Word History

Etymology

French, from Late Latin limitrophus bordering upon, literally, providing subsistence for frontier troops, irregular from Latin limit-, limes boundary + Greek trophos feeder, from trephein to nourish

First Known Use

1763, in the meaning defined above