(intransitive, literally) To grow roots into soil. / (intransitive, figuratively) To become established, to take hold.

(mathematics) Of a number or expression, a number or expression the cube of which is equal to the given number or expression.

(mathematics) The number which, when squared, yields another number. / (mathematics) The positive number which, when squared, yields another number; the principal square root.

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)

a reflex in infants in which the head is turned towards any stimulus; used to find the nipple

(computing) Alternative spelling of rootkit

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