noun
grass sickle; scythe for cutting grass
A farming or gardening tool with a curved blade used for cutting grass or weeds. The term is straightforward and has no special register or nuance.
祖父は草刈り鎌で庭の草を刈った。
My grandfather cut the grass in the garden with a grass sickle.
Standard spelling with okurigana; the most common written form.
Variant without okurigana; less common but still used.
鎌 is a general sickle or scythe, while 草刈り鎌 specifically refers to a sickle used for cutting grass.
Compound of 草刈り (grass cutting) + 鎌 (sickle). The derivation is transparent from its components.