Ginger, the underground stem, or rhizome, of the plant Zingiber officinale.

(idiomatic) People and society at the local (most basic) level rather than at the national centre of political activity / The essential foundation or source of something

A beverage, most often a carbonated soft drink made from a combination of vanilla, cherry tree bark, licorice root, sarsaparilla root, sassafras root bark, nutmeg, anise, and molasses, among other things.

(US) The root of the liquorice plant, Glycyrrhiza glabra, from which a sweet flavoring with an anise scent is extracted. / Glycyrrhiza, especially Glycyrrhiza lepidota (American licorice)

(computing) Alternative spelling of rootkit

(literally, of a plant) Having deep roots; (of a non-living object) deeply and firmly embedded (in the ground, etc.). / (figuratively) Firmly established in thought or behaviour and difficult to change.

The pressure (the result of osmosis) exerted by the roots of vascular plants that moves water into the leaves and causes guttation.

To dig or pull up by the roots; to deracinate.

(phytopathology) Any of several plant fungal diseases caused by having over-wet roots.

(anatomy) The hollow part of the root of a tooth, containing the nerve and blood vessels. / (dentistry) A surgical operation on a root canal, typically filling it with gutta-percha.