発砲はっぽう Common Noun Irregular Transitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru transitive verb firing;discharge of gun ウィリーは誤って父親の猟銃を発砲し、壁に穴を開けた。 Willie accidentally let off his father's shotgun and made a hole in the wall.