根本|こんぽんkonpon[0]heiban (flat)

1. nounroot; source; origin
   想像力そうぞうりょくは、すべての文明ぶんめいの根本こんぽんである。↗

   Imagination is the root of all civilization.
2. nounfoundation; basis; essence
   挨拶あいさつは礼儀作法れいぎさほうの根本こんぽんである。↗

   Greetings are the basis of good manners.

• Synonym基礎きそNeutralNeutral. The foundation or groundwork something is built on, as in 「基礎知識」; 「根本」 points to the most fundamental source and essence instead.
• Synonym元もとNeutralNeutral. An origin or cause, as in 「元を断つ」; 「根本」 is more at home in written prose and stresses essence.
• Synonym根底こんていWrittenWritten/formal prose. The depths or underlying layer of something, as in 「根底から覆す」; 「根本」 centers on essence.
• Synonym土台どだいNeutralNeutral. A foundation or groundwork, also an adverb meaning 'by nature, from the start'; 「根本」 centers on essence.
• Synonym基底きていWrittenWritten/formal prose. A base or substratum, often in mathematics; 「根本」 centers on essence.
• SynonymベースNeutralNeutral loanword. A base or basis, also a base camp or depot; 「根本」 centers on essence and source.
• Synonym基盤きばんNeutralNeutral. The underpinning or infrastructure something rests on, as in 「生活基盤」; 「根本」 centers on essence.
• Synonym根源こんげんWrittenWritten/formal prose. The root or origin of things, as in 「諸悪の根源」; 「根本」 centers on essence.
• Synonym下地したじNeutralNeutral. Groundwork, basic training or an undercoat of paint; 「根本」 centers on essence.
• Synonym根っこねっこCasualColloquial. Roots of a plant or the root of a matter; 「根本」 is the more written, abstract choice.
• Synonym礎いしずえWrittenWritten/formal prose. A cornerstone, mostly figurative, as in 「国の礎」; 「根本」 centers on essence.
• Synonym基本きほんNeutralNeutral. The basics or fundamental principles; 「根本」 points to the deepest essence.
• Synonym根元ねもとNeutralNeutral. The base of a plant or the root of a problem; 「根本」, read こんぽん, is the more abstract term for essence.
• Related礎石そせきWrittenWritten/formal prose. A foundation stone used figuratively for a basis; 「根本」 centers on essence.
• Related根拠こんきょNeutralNeutral. Grounds or reasons for something, as in 「根拠がない」; 「根本」 centers on essence and source.
• Antonym末梢まっしょうWrittenWritten/formal prose. Tips or trivial details — the opposite of 「根本」.
• Antonym枝葉えだはNeutralNeutral. Branches and leaves, i.e. the unimportant parts — the opposite of 「根本」.

Use 「根本」 for the most fundamental source and essence, as in 「根本的な解決」. For foundations say 「基礎」 or 「基本」; for a root or origin, 「根源」; for a base or groundwork, 「土台」; for grounds or reasons, 「根拠」; for minor details, 「枝葉」. The rest overlap: 「元」 for origins and causes, 「根元」 and 「根っこ」 for literal roots, 「根底」 for underlying depths, 「基盤」 for underpinnings, 「ベース」 for a base, 「下地」 for groundwork or training, 「礎」 and 「礎石」 for cornerstones, 「基底」 for substrata, and 「末梢」 as the opposite of the essential core.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （コンポン）物事ものごとを成立せいりつさせるのに必要ひつような事柄ことがら。