Root
Source, Origin, Foundation
noun, の adjective
The root origin is the root of something. Possibly even more root than root, but we'll stick with root.
こんぽん
ねもと
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Careful, 本 is ぽん, which is a weird rendaku.
そもそも、根本から間ちがってるんだよ。
First of all, you are fundamentally wrong.
そのふうふは、子どもの教育についての根本の考え方が合わなかったんです。
That couple had fundamentally different ideas about their kid's education.
クリステンはベーコンを食べませんが、この問題の根本の原因はどこにあると思いますか？
Kristen doesn’t eat bacon; where do you think the root of this problem lies?