city in Idaho, U.S., from French-Canadian boisé, literally "wooded," from French bois "wood," which (with Italian bosco, Spanish bosque, Medieval Latin boscus) apparently is borrowed from the Germanic root of bush (n.). Medieval Latin boscus was used especially of "woodland pasture."
c.1860, as a place name, originally applied to part of what is now eastern Colorado (Idaho Territory organized 1863; admitted as a state 1890); from Kiowa-Apache (Athabaskan) idaahe "enemy," a name applied by them to the Comanches.
State in the Rocky Mountains bordered by British Columbia, Canada, to the north; Montana and Wyoming to the east; Utah and Nevada to the south; and Oregon and Washington to the west. Its capital and largest city is Boise.