adverb, adverb taking the 'to' particle
vigorously; briskly; boisterously
Describes doing something with energetic, rough, or forceful movements, often with a sense of noisiness or lack of restraint. Common in casual contexts.
He scratched his head vigorously.
He ate his meal vigorously.
The children are playing boisterously.
He scratched his head vigorously with a troubled look.
I roughly filed down the surface of the wood to shape it.
When I was young, I used to work vigorously.
Katakana is the most common written form for this onomatopoeic adverb.
Hiragana spelling is also used, though less common than katakana.
Onomatopoeic word mimicking the sound or feeling of rough, energetic movement. The exact origin is uncertain.