重要|じゅうようjuuyou[0]heiban (flat)

1. na-adjectiveimportant; essential; significant; major; key; principal
   その結び目むすびめを守まもるのは重要じゅうようなことだ。↗

   Maintaining that tie is important.

• Synonym肝心かんじんNeutralRefers to what is crucial and essential, as in 「肝心なところ」; stresses the core point and is common in speech.
• Synonym大事だいじNeutralMeans important and cherished, as in 「大事にする」; common in speech and carries emotional color.
• Synonym大切たいせつNeutralMeans important and precious, as in 「大切な人」; stresses treasuring and caring for something.
• Synonym肝要かんようWrittenWritten style for vitally important, as in 「肝要な点」; more bookish than 「肝心」.
• Synonym緊要きんようFormalA formal term for pressing importance, as in 「緊要な課題」; carries a sense of urgency.
• Synonym重大じゅうだいNeutralMeans grave or serious, as in 「重大な事故」; often implies negative consequences.
• Synonym枢要すうようFormalA formal term for a pivotal, key position, as in 「枢要な地位」; leans toward political contexts.
• Related主要しゅようNeutralMeans main or principal, as in 「主要都市」; stresses holding the leading position.
• Related必要ひつようNeutralMeans necessary or needed, as in 「必要な書類」; stresses that something cannot be lacked.
• Related不可欠ふかけつNeutralMeans indispensable, as in 「不可欠な要素」; emphasizes that things fail without it.
• Related基本的きほんてきNeutralMeans fundamental or basic, as in 「基本的な考え」; stresses the foundation of something.
• Related根本的こんぽんてきNeutralMeans fundamental, as in 「根本的な解決」; stresses going to the root or source.
• Related必須ひっすNeutralMeans indispensable; covers both required-by-rule items and objective necessity, as in 「必須科目」 and 「必須の栄養素」.
• Related本質的ほんしつてきNeutralMeans essential or intrinsic, as in 「本質的な問題」; stresses the inner nature of things.
• Related有意義ゆういぎNeutralMeans meaningful and worthwhile, as in 「有意義な時間」; stresses that something has value.
• Related第一だいいちNeutralMeans first or foremost, as in 「安全第一」; stresses ranking before all else.
• Related決定的けっていてきNeutralMeans decisive, as in 「決定的な証拠」; stresses swaying the final outcome.
• Related由々しいゆゆしいFormalA formal term for a grave, alarming situation, as in 「由々しき事態」.
• Related貴重きちょうNeutralMeans precious and hard to come by, as in 「貴重な経験」 or 「貴重品」.
• Related意義深いいぎぶかいWrittenWritten style meaning deeply significant, as in 「意義深い経験」.
• Related第一義的だいいちぎてきFormalA formal term for primary and fundamental, found mostly in expository prose, as in 「第一義的な目的」.
• Related切要せつようWrittenWritten style meaning vital and pressing; rare, close to 「肝要」 but even less common.
• Antonym瑣末さまつWrittenThe opposite of 「重要」: written style for trivial, unimportant matters, as in 「瑣末な問題」.
• Antonym軽微けいびWrittenThe opposite of 「重要」: slight or minor, as in 「軽微な違反」 or 「軽微な損傷」; formal in tone, while speech says 「軽い」.

Default to 「重要」. In speech say 「大事」 or 「大切」; for the crucial point use 「肝心」; for necessity use 「必要」, 「不可欠」 or 「必須」; for main use 「主要」; for precious use 「貴重」; for grave use 「重大」; for trivial use 「瑣末」. 「肝要」 and 「切要」 are written style, 「枢要」「緊要」「由々しい」「第一義的」 are formal, and 「基本的」「根本的」「本質的」「意義深い」「有意義」「第一」「決定的」 narrow the sense to basic, root, intrinsic, meaningful, first, or decisive.

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

1. それが欠かけることにより、あることが成立せいりつすることについて支障ししょうが生しょうじること。非常ひじょうに大事だいじであること。
2. それが欠かけることにより、あることが成立せいりつすることについて支障ししょうが生しょうじている状態じょうたい。非常ひじょうに大事だいじであるさま。