()

noun
root
1. root (of a plant)
The part of a plant that grows underground, absorbing water and nutrients.
Roots have started to come out.
This tree has deep roots.
I watered the roots of the flowers.
The tree fell from the roots in the typhoon.
If you don't pull weeds out by the roots, they'll grow back.
2. root, basis, foundation
The fundamental cause or source of something; the core or essence.
To search for the root of the problem.
He's a kind person at heart.
()は〜 = at heart, fundamentally
You shouldn't believe groundless rumors.
()()もない = groundless, baseless
Let's listen from the root of the matter and find the real cause.
()から = from the root, fundamentally
This problem is deep-rooted, so it can't be easily resolved.

USAGE: () refers to both literal plant roots and figurative foundations/causes. It's used in many idiomatic expressions.

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