root

US /ruːt/
UK /ruːt/
"root" picture
1.

the part of a plant that attaches it to the ground or to a support, conveying water and nourishment to the rest of the plant via numerous branches and fibers

:
The tree's roots spread deep into the soil.
Carrots are edible roots.
2.

the fundamental or ultimate source of something

:
Lack of communication is often the root of relationship problems.
We need to get to the root of the problem.
1.

establish deeply and firmly

:
The new ideas have rooted themselves in the community.
The plant rooted quickly in the fertile soil.
2.

cause (a plant or cutting) to grow roots

:
You can root cuttings in water or soil.
She learned how to root roses from her grandmother.