godan verb (-su)
beat a drum
Rare literary verb for beating a drum; modern Japanese normally uses 太鼓を打つ or 鼓する.
古い軍記物では、陣太鼓を鼓す場面が描かれる。
In old war tales, scenes of beating a war drum are depicted.
godan verb (-su)
pluck up courage
Rare literary use; the expression 勇気を鼓す is occasionally found, but 勇気を奮い起こす is far more common.
彼は勇気を鼓して立ち向かった。
He plucked up his courage and faced it.