急|きゅうkyuu[0]heiban (flat)

1. na-adjectivesudden; abrupt; unexpected
2. na-adjectiveurgent; pressing
3. na-adjectivesteep; sharp; precipitous
   屋根やねにいく階段かいだんは狭せまくて急きゅうでくらいです。↗

   The staircase leading to the rooftop is narrow, steep, and dark.
4. na-adjectiverapid; swift; fast
   この川かわの流ながれは急きゅうだ。↗

   The current of this river is rapid.
5. nounemergency; crisis; danger
6. nounurgency; hurrying; haste
   事態じたいは急きゅうを要ようするので一刻いっこくも待まてないと彼かれは言いった。↗

   He said that the matter was urgent, and that there was not a moment to lose.
7. noun(in gagaku or noh) end of a song

• Synonym突然とつぜんNeutralNeutral adverb for something happening with no warning, as in 「突然雨が降り出す」. 「急」 as an adjectival noun also covers urgent and steep.
• Synonym唐突とうとつWrittenWritten word for something abrupt that feels jarring or out of place, as in 「唐突な質問」; carries an awkward, ill-timed nuance.
• Synonym不意ふいWrittenWritten word for the unexpected, catching someone off guard, as in 「不意を突く」; stresses that something was unforeseen.
• Synonym突如とつじょWrittenWritten adverb for something arising all of a sudden, as in 「突如現れる」; typical of narrative prose.
• Synonym不意にふいにNeutralNeutral adverb for something happening suddenly and unexpectedly, as in 「不意に声をかけられる」.
• Synonym急にきゅうにNeutralNeutral adverb, very common in speech, as in 「急に寒くなる」; covers sudden change but does not convey urgency of a situation.
• SynonymにわかWrittenFor things arising suddenly, also temporary or impromptu, as in 「にわか雨」; 「にわかファン」 is a bandwagon fan.
• Synonym出し抜けだしぬけCasualColloquial word for catching someone off guard, as in 「出し抜けに言う」.
• Synonym突発的とっぱつてきWrittenWritten word for events or incidents breaking out without warning, as in 「突発的な事故」.
• Related急激きゅうげきWrittenWritten word for change that is sudden and intense, as in 「急激な変化」.
• RelatedたちまちWrittenWritten adverb meaning in an instant, as in 「たちまち売り切れる」; stresses how fast a result arrives.
• RelatedふとWrittenFor something happening quite without thinking, as in 「ふと思い出す」; suddenness that is casual and unbidden.
• RelatedパッとCasualMimetic word for something happening in a flash, as in 「パッと明るくなる」.
• Related俄然がぜんWrittenWritten adverb for something suddenly turning or surging, as in 「俄然やる気が出る」.
• RelatedふいとCasualColloquial adverb for acting suddenly, as in 「ふいと立ち去る」.
• RelatedふっとCasualFor something happening suddenly, or a soft puff of breath, as in 「ふっと笑う」.
• RelatedひょいとCasualFor appearing or acting lightly and nimbly, or by chance, as in 「ひょいと現れる」.
• RelatedばっとCasualMimetic word for a sharp, sudden movement, as in 「ばっと飛び出す」; darting out or scattering at once.
• Antonym緩WrittenThe opposite of 「急」, meaning slow, mostly as 「緩やか」「緩慢」.
• Antonym徐WrittenThe opposite of 「急」, meaning slow and gradual, mostly as 「徐々に」「徐行」.

For sudden events, 「急に」 and 「突然」 are the everyday choices; say 「急な」 for urgency. Use 「不意」 for taking someone by surprise, 「ふと」 for offhand, unthinking moments, 「急激」 for drastic change, and 「たちまち」 for in an instant; slowness is 「緩やか」 or 「徐々に」. The others add finer shades: 「唐突」 jarring, 「突如」 narrative, 「出し抜け」 catching someone off guard, and the mimetics 「パッと」「ばっと」 for flash-like movement.

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

1. （キュウ）急いそぐこと。
2. （キュウ）切迫せっぱくした事態じたい。
3. （キュウ）雅楽ががく・能楽のうがくなどで、曲きょくの最後さいごの部分ぶぶん。
4. （キュウ）急いそぐ様さま。
5. （キュウ）流ながれなどが速はやい様さま。
6. （キュウ）傾斜けいしゃが激はげしい様さま。
7. （キュウ）切迫せっぱくしている様さま。
8. （キュウ）前触まえぶれなく行おこなわれる様さま。