granchio

Etymology
From a or  or  (following metathesis and syncopation), diminutive of, or from the accusative form  through an intermediate Vulgar Latin form  or. The Latin derives from, dissimilation of (because the pincers of a crab form a circle), from , reduplication of. See also the doublet.

Noun

 * 1) crab (animal)
 * 2)  mistake