'Root' in the Bible

For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.

And if some of the branches be broken off, and thou, being a wild olive tree, wert graffed in among them, and with them partakest of the root and fatness of the olive tree;

Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.

And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust.