Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
poleaxe [ˈpəulæks] n (butcher's) топо́р; (HISTORY) секи́ра
vt (hit) тре́снуть (perf) (surprise) ошеломля́ть (ошеломи́ть*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.