さっさとsassato

1. adverbquickly; promptly; immediately; without delay; without hesitation; briskly; hurriedly; hastily
   さっさと宿題しゅくだいをしなさい。↗

   Do your homework without delay.
2. adverbindifferently; coldly

• Synonymいち早くいちはやくNeutralNeutral. Highlights beating others to it, as in 「いち早く駆けつける」; さっさと is about doing something yourself briskly, without dawdling.
• Synonym早くはやくNeutralNeutral. The all-purpose word for early or fast, as in 「早く帰る」; it lacks the crisp, no-hesitation feel of さっさと.
• Synonym早速さっそくNeutralNeutral. For starting or happening at once, as in 「早速始めよう」「早速トラブルが起きた」; さっさと stresses brisk, tidy action.
• SynonymすぐNeutralNeutral. The most common choice: a very short time gap, right away, as in 「すぐ行く」; さっさと stresses crisp, undawdling action.
• SynonymすぐさまNeutralNeutral. At once, without a moment's hesitation, as in 「すぐさま対応する」; stronger than 「すぐ」, and about fast reaction rather than brisk action.
• Synonym直ちにただちにFormalFormal. At once, without delay, typical of notices and commands, as in 「直ちに避難してください」; さっさと is the more colloquial choice.
• Synonym至急しきゅうWrittenWritten/formal. Urgent, at top speed — work reminders, documents, as in 「至急連絡ください」; さっさと is everyday spoken language.
• SynonymさっとNeutralNeutral. A single swift movement, as in 「さっと拭く」, or wind and rain arriving suddenly; it is about the instant, while さっさと is about finishing without dawdling.
• SynonymとっととCasualColloquial. Close in meaning but ruder, mostly in commands or shooing someone off, as in 「とっとと帰れ」; さっさと also works in plain narration.
• Synonym早うはようCasualColloquial. A dialectal, old-fashioned 早く, common around Kansai, as in 「はよう来て」; it carries none of さっさと's briskness.
• Synonym早いとこはやいとこCasualColloquial. For getting something done soon or quickly, as in 「早いとこ片付けよう」; used to urge others or oneself, and close to さっさと.
• Synonym疾くとくWrittenWritten/formal. Archaic for quickly, also for long ago; now rare, seen only in classical or archaizing prose. Say 「早く」 or 「さっさと」 in daily speech.
• SynonymぱっぱとCasualColloquial. For briskly polishing off things one after another, as in 「ぱっぱと済ませる」; close to さっさと but with a more casual ring.
• SynonymちゃっとCasualColloquial. Swiftly, nimbly; can also mean a little. Rare today — in everyday speech use 「さっさと」 or 「さっと」.
• Synonym大至急だいしきゅうNeutralNeutral. Even more pressing than 「至急」: utmost urgency, mostly in work communications; さっさと only means not dawdling, with no such urgency.
• Synonym直様じきさまNeutralNeutral. Same meaning as 「すぐさま」: at once, on the spot. Compared with さっさと it stresses quick reaction, not brisk action.
• Synonym疾く疾くとくとくWrittenWritten/formal. Archaic doubling of 「疾く」, for hurry up, quick quick; rare today. Everyday speech says 「早く早く」 or 「さっさと」.
• Related急遽きゅうきょWrittenWritten/formal. For acting hastily because of a sudden development, as in 「急遽予定を変更する」; さっさと has no sense of suddenness or haste.
• AntonymのろのろとCasualColloquial. Slow and dawdling, as in 「のろのろと歩く」; the direct opposite of crisp, brisk さっさと.
• AntonymゆっくりとNeutralNeutral. Slowly, unhurriedly, not necessarily negative; stands opposite さっさと in speed and pace.

Use 「さっさと」 for getting something done briskly and without hesitation — often with a nudging tone. Say 「すぐ」 for right away, 「早速」 for starting at once, 「直ちに」 in formal directives, and 「とっとと」 to rudely shoo someone off. 「いち早く」 adds the nuance of beating others to it; 「のろのろと」 and 「ゆっくりと」 are the slow opposites.

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

1. 物事ものごとを迷まよいやためらいなく素早すばやく行おこなうさま。