One who, or that which, roots; one that tears up by the roots.

(by extension) A type of heavy machinery similar to a plow for breaking up soil, concrete, asphalt, etc.

(woodworking) A blade for producing a narrow groove in a piece of wood.

A device for boring a pathway through a blocked drain or sewer.

One who roots or rummages through something.

(computing) A type of malware that obtains and runs using privileged access, bypassing normal security systems.

One who holds a primary or founding position in an enterprise.

A plant, viewed in terms of how it establishes its roots.

(US, slang) One who roots for, or applauds, something.