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"vigorously" is also used as a crossword clue. If that's what you saw, the answer is often forcefully (10 letters).
Definitions
with vigor; in a vigorous manner
Word origin
From vigorous + -ly.
Used in a sentence
“The lawyer vigorously defended her client.”
“He knocked vigorously on the door.”
“The tender roared along vibrating vigorously; braking had resulted in "flats" on most of its tyres.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“With great force”10 letters
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