sickle (n.) Look up sickle at Dictionary.com
Old English sicol, probably a West Germanic borrowing (cf. Middle Dutch sickele, Old High German sihhila, Dutch sikkel, German Sichel) from Vulgar Latin *sicila, from Latin secula "sickle" (cf. Italian segolo "hatchet"), from PIE root *sek- "cut" (see section). Applied to curved or crescent-shaped things from mid-15c. Sickle-cell anemia is first recorded 1922.