{s} pinned down, fixed in place with a sharp or pointed object; pierced through with a sharp object, stabbed; made helpless, immobilized with a word or look
To impale something on a pointed object means to cause the point to go into it or through it. Researchers observed one bird impale a rodent on a cactus. if someone or something is impaled, a sharp pointed object goes through them be impaled on sth (empaler, from impalare, from palus )