1: to join (coats of arms) on a heraldic shield divided vertically by a pale2 a: to pierce with or as if with something pointed; especially: to torture or kill by fixing on a sharp stakeb: to fix in an inescapable or helpless position
This seems to only support impale to mean pierced. To torture or kill by fixing on a sharp stake b: to fix in an inescapable or helpless position
It's just cult loaded language to be different.