From Old Spanish aniello, from Latin ānellus (“little ring”), from ānulus, diminutive of ānus (“ring”), from Proto-Indo-European *h₁eh₂no- (“ring”). Compare Catalan anell, French anneau, Italian anello, Portuguese anel.
anillo m (plural anillos)
The difference between anillo and anilla: both translate as ring in English. anillo is for the jewellery, also the planetary ring, ring on a tree, bullfighting ring, building in a circular shape, geometrical ring, among others. anilla may refer to a curtain ring, ring on a shoe, a ring onto which to tie a rope, a ring put round a bird's foot for tracking (also known as anillo, a gymnastic ring, among others.