noun, masculine/kwaˈtɾiʝo/plural: cuatrillos
an obsolete letter shaped like a 4 with a hook from colonial Mayan orthographies to indicate a velar ejective
Etymology tree Proto-Indo-European *kʷetwṓr Proto-Italic *kʷettwōr Latin quattuor Old Spanish quatro Spanish cuatro Proto-Indo-European *-lós Proto-Indo-European *-elós Proto-Italic *-elos Latin -lus Latin -ellus Old Spanish -iello Spanish -illo Spanish cuatrillo From cuatro (“four”) + -illo.