adverb, adverb taking the 'to' particle
Describes loud, repetitive impact sounds such as drumming, knocking, stomping, or booming.
誰かがドアをどんどん叩いている。
Someone is banging on the door.
太鼓をどんどんと打ち鳴らした。
They beat the drum loudly.
adverb, adverb taking the 'to' particle
rapidly; steadily; one after another
Indicates that something progresses quickly, continuously, or in rapid succession without stopping.
仕事がどんどん片付いていく。
The work is getting done steadily.
新しい店がどんどんできている。
New shops are opening one after another.