pick·axe or pick·ax 
(pĭkăks′)
(pĭkăks′)n.
A pick, especially with one end of the head pointed and the other end with a chisel edge for cutting through roots.
v. pick·axed, pick·ax·ing, pick·ax·es
v.intr.
To use a pickaxe.
v.tr.
To use a pickaxe on.
[Middle English picax, alteration (influenced by ax, axe) of picas, from Old French picois (from pic, pick) and from Medieval Latin pīcōsa, both probably from Latin pīcus, woodpecker.]
pickaxe