どんどん

どんどん is a versatile adverb that describes something happening at a fast pace or increasing steadily over time. It conveys a sense of continuous, active progression without a sense of stopping. It is commonly used with verbs to show rapid or continual change, growth, or accumulation, and can also intensify adjectives or verbs with a soft emphatic tone when paired as どんどんと. Note that it does not typically attach to the past tense; it emphasizes ongoing or future progression.