Definitions:
the part of a plant which attaches it to the ground or to a support, typically underground, conveying water and nourishment to the rest of the plant via numerous branches and fibres

the basic cause, source, or origin of something

a number or quantity that when multiplied by itself, typically a specified number of times, gives a specified number or quantity.

a user account with full and unrestricted access to a system

an act or instance of having sex.

cause (a plant or cutting) to grow roots

establish deeply and firmly

cause (someone) to stand immobile through fear or amazement

gain access to the root account of (a smartphone or computer)

have sex with.

(of an animal) turn up the ground with its snout in search of food

an act of rooting