d1 is a hoe/hoe-shaped bladed tool for hoeing/cutting d2, with blade material d3.
Defined by a blade that crosses the handle at a nearly right angle (creating a T shape -- hence a synonym is ty zei dakfu). By contrast, kurdakfu 'scythe' is defined by a blade that joins the handle at a right angle, but does not cross it. Other potential synonyms: derdakfu, dercpudakfu.