至急|しきゅうshikyuu[0]heiban (flat)

1. no-adjectiveurgent; pressing; immediate; prompt; express
   彼女かのじょは私に至急しきゅう電報でんぽうを打うってきた。↗

   She sent me an urgent telegram.
2. noun, adverburgently; promptly; at once; right away; without delay; as soon as possible

• Synonym早速さっそくNeutralAbout starting something at once without delay, as in 「早速始める」; 「至急」 is for urging urgent handling of a matter.
• Synonym早々そうそうNeutralMostly in the pattern 「〜早々」, meaning 'just after doing something'; 「至急」 asks for something to be handled promptly.
• SynonymすぐNeutralSimply 'right away', and very common in everyday speech; 「至急」 is more formal and typically used to urge prompt action.
• SynonymすぐさまNeutralMeans at once, without a moment's hesitation; 「至急」 is what you use to ask someone to handle something urgently.
• SynonymさっさとCasualColloquial for getting something done briskly, often with an urging or coldly curt tone; 「至急」 leans toward business settings.
• Synonym大至急だいしきゅうNeutralSignals even greater urgency than 「至急」: an extremely pressing, drop-everything situation.
• Synonym猶予なくゆうよなくWrittenWritten/formal prose for 'without delay'; 「至急」 is the more common choice.
• Related早々はやばやNeutralMostly in the pattern 「〜早々」, meaning 'just after doing something'; 「至急」 asks for something to be handled promptly.
• Related迅速じんそくWrittenA written/formal word for quick, timely action; 「至急」 stresses that the matter itself is urgent and must be dealt with now.
• Relatedいち早くいちはやくNeutralMeans acting before others, being the first to do something; 「至急」 is about urgency, not beating others to it.
• Related早くはやくNeutralA plain 'hurry up', often used to urge someone, as in 「早く来て」; 「至急」 is more formal.
• RelatedさっとNeutralA mimetic word for a quick, crisp movement; 「至急」 stresses that the situation itself is urgent.
• RelatedたちまちWrittenWritten/formal prose for 'in an instant, suddenly', as in 「たちまち雨が降り出した」; it describes change, while 「至急」 makes a request.
• RelatedみるみるNeutralDescribes something changing rapidly before your eyes, as in 「みるみる回復」; 「至急」 is for making a request.
• Related早いとこはやいとこCasualColloquial for 'let's get it done quick', as in 「早いとこ片付けよう」; 「至急」 is more formal.
• RelatedちゃっとCasualColloquial and dialect-flavored, for moving nimbly; in everyday speech 「さっと」 is what people normally say.
• Antonym後日ごじつNeutralThe opposite of 「至急」 on the time axis: it points to later on, another day, not now.
• AntonymゆっくりNeutralThe opposite of 「至急」 in tempo: slowly and without hurry.

Use 「至急」 to ask for urgent handling; 「大至急」 when it is even more pressing. In casual speech say 「すぐ」 or 「早く」. For describing rapid change use 「忽ち」 or 「みるみる」; the opposites are 「後日」 (later) and 「ゆっくり」 (slowly).

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

1. 非常ひじょうに急いそぐこと。
2. 至急しきゅう電報でんぽう。
3. 非常ひじょうに急いそぐさま。