どんどんdondon

1. adverb (with と)drumming (noise); beating; pounding; banging; booming; stamping
   だれかがドアをどんどんたたいている。↗

   Someone is battering at the door.
2. adverb (with と)rapidly; quickly; steadily
   ある種しゅの動物どうぶつはどんどん数かずが減へってきている。↗

   Certain animals are fast disappearing.
3. adverb (with と)continuously; one after the other; in succession

• RelatedみるみるCasualColloquial. Something changes rapidly before your eyes, as in 「みるみる顔色が変わる」; it stresses the speed of change, while 「どんどん」 stresses one thing after another.
• Related着々ちゃくちゃくWrittenWritten/formal. Steady, orderly progress, as in 「着々と準備を進める」; it stresses methodical, step-by-step advance rather than rapid succession.
• RelatedコツコツCasualColloquial. Persistent effort a little at a time, as in 「コツコツ貯金する」; it stresses steady accumulation, while 「どんどん」 stresses rapid, continuous progress.
• RelatedさっさとCasualColloquial. Doing something briskly without dawdling, as in 「さっさと片付ける」; the point is finishing quickly and cleanly, not continuous progress.
• RelatedせっせとCasualColloquial. Working diligently without a break, as in 「せっせと働く」; it stresses tireless effort, while 「どんどん」 stresses speed and continuous advance.
• RelatedとっととCasualColloquial. Hurry up and go, with an impatient, brusque tone; mostly in commands like 「とっとと帰れ」. Not a neutral substitute for 「どんどん」.
• Related疾くとくWrittenWritten/formal. An archaic word for quickly, or for 'long ago'; essentially unused in modern Japanese, so it cannot replace 「どんどん」 in everyday speech.
• RelatedぐんぐんCasualColloquial. Rapid progress full of momentum, as in 「ぐんぐん伸びる」; close to 「どんどん」 but with a stronger sense of force and vigor.
• Antonym徐々にじょじょにNeutralNeutral. Antonym: change proceeds slowly and gradually, the opposite of the rapid pace of 「どんどん」.
• AntonymゆっくりNeutralNeutral. Antonym: slowly and unhurriedly, without rushing — the opposite of the quick, nonstop pace of 「どんどん」.

For rapid, nonstop progress, 「どんどん」 is the default. Use 「みるみる」 for change seen happening before your eyes, 「着々」 for steady, orderly progress, 「ぐんぐん」 for vigorous momentum, 「コツコツ」 for patient accumulation, 「さっさと」 for brisk, no-nonsense speed, and 「徐々に」 or 「ゆっくり」 for slowness.

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

1. 物事ものごとをためらわずにするさま。
2. 物事ものごとが次次つぎつぎと続つづくさま。
3. 物ものを強つよく叩たたく音おと。
4. 太鼓たいこや花火はなびが鳴なる音おと。