noun
powerful writing; facile pen
Refers to vigorous, fluent, or prolific writing ability. Often used in literary or journalistic contexts to praise someone's writing skill or output.
彼は健筆を振るって多くの随筆を発表した。
He wielded a facile pen and published many essays.
その作家の健筆ぶりにはいつも感心する。
I am always impressed by that writer's powerful prose.