mattock
Concise Oxford English Dictionary © 2008 Oxford University Press:
mattock/ˈmatək/
▶noun an agricultural tool similar to a pickaxe, but with one arm of the head curved like an adze and the other like a chisel edge, used for breaking up hard ground, digging up roots, etc.
– origin OE mattuc, of uncertain origin.
'mattock' also found in these Oxford entries:

