緊要|きんようkin'you[0]heiban (flat)

1. na-adjective, nounmomentous; exigent; urgent; important; vital

• Synonym肝心かんじんNeutralNeutral and common in everyday speech; stresses being the crucial core of the matter, as in 「肝心な時に」. More colloquial than 「緊要」.
• Synonym重要じゅうようNeutralThe most common neutral word for important, at home in both speech and writing; its range of use is the broadest of this group.
• Synonym肝要かんようWrittenWritten/formal prose for vitally important; often in the pattern 「〜が肝要だ」. Very close in meaning to 「緊要」.
• Synonym大切たいせつCasualColloquial and the everyday favourite; covers precious and cherished as well as important, also used for treasuring people or things.
• Synonym重大じゅうだいWrittenWritten/formal prose for grave or major; describes matters of great impact or consequence, as in 「重大な事故」 and 「重大な発見」.
• Synonym大事だいじNeutralNeutral and common in daily life; means important and also cherished, and can refer to a major event or incident.
• Synonym枢要すうようFormalFormal and rare; stresses standing at the very hub or centre of things rather than mere importance.
• Related大事だいじNeutralNeutral and common in daily life; means important and also cherished, and can refer to a major event or incident.
• Antonym不要ふようNeutralNeutral; unnecessary or unneeded — the exact opposite of the extremely important 「緊要」.
• Antonym無用むようWrittenWritten/formal prose; useless or superfluous, standing in contrast to the vitally important 「緊要」.
• Antonym瑣末さまつWrittenWritten/formal prose; trivial and insignificant, the opposite of the critically important 「緊要」.

In written or formal prose, 「緊要」 marks something extremely important or critical, as in 「緊要な課題」, sometimes with a nuance of urgency. For everyday importance pick 「大事」 or 「大切」; for the crucial point 「肝心」; in writing, 「肝要」.

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

1. 極きわめて大切たいせつなこと。