A scythe is a sharp, curved blade used for mowing or reaping. While farmers use it to cut plants, the grim reaper uses it to, well, scare you to death.
In Old English, scythe was spelled siðe. Since there is no longer an ð in modern English, scythe became the accepted form of the word in the early 15th century. It drew its sc- start from the Latin scissor, meaning “carver, cutter.” Farmers use these tools to slice and trim grass and other plant stalks. Napoleon Bonaparte once noted that “Occupation is the scythe of time,” meaning that work mows down or diminishes time.