Simple past tense and past participle of impale.(verb)
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Use "impaled" in a sentence
"However, fallen trees remain impaled into homes, tangled in electrical wires and everywhere else imaginable."
"His sword impaled one, but the weapon was wrenched aside as the leader flung the expendable one forward and raised his axe in both hands."
"Colvin, the Cubs 'baserunner at third, was struck by a piece of shattered bat ( "impaled" seems like too strong a term; "stabbed" is more accurate) as he scored."