ˈhak- — see berry noun
Etymology: alteration of hagberry
1. : any of several No. American trees or shrubs of the genus Celtis ; especially : a large roundheaded tree ( C. occidentalis ) of eastern and central United States that has dark purple edible berries and is sometimes planted for shade or in shelterbelts — called also sugarberry
2. : the pale to grayish or greenish yellow moderately hard tough wood of hackberry (especially C. occidentalis )