Arapaho originates in the Pawnee term
tirapihu, meaning "
He buys or trades,"
as the Arapaho were the trading tribe
in the Great Plains region. They have
long been closely linked with the
Cheyenne tribe, who called them
"Cloud Men." The name given to them
by the Sioux has a similar meaning:
"Blue Cloud Men". o
They originated
near the headwaters of the Mississippi
River  where they lived in villages and
raised abundant corn crops. Later the
tribe migrated and "lost the corn,"
meaning they ceased to plant corn.
They had become nomadic buffalo
hunters who live in te
epees, generally in
the company of the Cheyenne.