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pickaxe (n.)

also pick-axe, "tool used for breaking up and digging ground," especially a pick with a sharp point on one side of the head and a broad blade on the other, early 15c., folk etymology alteration (by influence of axe) of Middle English  picas, pikeis (mid-13c.), via Anglo-French piceis, Old French pocois (11c.) and directly from Medieval Latin picosa "pick," which is related to Latin picus "woodpecker" (see pie (n.2)).

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Definitions of pickaxe from WordNet

pickaxe (n.)
a heavy iron tool with a wooden handle and a curved head that is pointed on both ends;
Synonyms: pick / pickax
From wordnet.princeton.edu