άγνως is a New Testament hapax legomenon. άγνός occurs two other times in Paul, both occurrences are in 2 Cor.

If you go hunting and want to bring something back to eat, you have to be in for the kill.

[S]uch souls as were detruded from the body by any violent method went strait to Valhalla. (Latin original: Nostratibus sane hoc erat infallibiliter persuasum, animas, non vulgares, neque senio morbove, sec cruenta morte & vi corporibus exeuntes, recta ad Vahlallam ferri)

They passed a stopped car on the side of the road, but realized there was nothing they could do to help.