As a verb impale
is to pierce with a pale; to put to death by fixing on a sharp stake.
As an adjective enfiled is
(heraldry) having some object, such as the head of a man or beast, impaled upon it.
impale
English
Alternative forms
* empale (obsolete)
Verb
(impal)
to pierce with a pale; to put to death by fixing on a sharp stake.
more generally, to pierce (something) with any long, pointed object.
enfiled
English
Adjective
(-)
(heraldry) Having some object, such as the head of a man or beast, impaled upon it.
Usage notes
* The piercing element is said to be "enfiled of" the thing that it pierces.
(
Webster 1913)