Root
noun
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word:
This is a magic root that turns you into a horse. You take a bite and let out a loud neigh (ね)!
この花の根は食べられますよ。
You can eat the roots of this flower.
木の根が地下に入ってきてしまった。
The roots of the tree are coming through the basement.
彼は素敵な人だと思うかもしれないが、根がひどい男なのだ。
You might think he’s a great person but he’s really a horrible man at heart.