ochava

eighth, one-eighth (one of eight equal parts of any amount or thing); ochava (a traditional unit of mass equivalent to about 3.6 g); synonym of chaflán, chamfer (an area added or removed from a wall or piece of furniture to break up corners, a diagonal sidewalk acting as a chamfer at street corners); alternative form of ochavo, octave (a weeklong saint's festival or local party); octave (the last of the seven days of the festival)

Inherited from Latin octāvus (“one-eighth”). Equivalent to ocho + -ava. In reference to weeklong celebrations, from the prevalence of inclusive counting in Latin. Doublet of ochavo. Cognate with Galician and Portuguese oitava and Catalan octava.