octave
UK[ˈɒktɪv]US[ˈɑːktɪv]
n
A series of eight musical notes occupying the interval between (and including) two notes, one having twice or half the frequency of the other.
n
The interval between two such notes.
n
A group or stanza of eight lines; an octet.
Morpheme Breakdown
oct
ave
oct
eight
ave
noun suffix
Etymology
The word "octave" has a direct and logical lineage from the Latin word for the number eight, octo. It entered English via Old French octave, which itself was derived from the Medieval Latin octava (dies), meaning "the eighth (day)". This term was used in both liturgical contexts to denote an eight-day festival and in musical theory to describe the interval spanning eight diatonic notes. The core semantic link is consistently numerical, with the modern abstract meanings in music and poetry all deriving from the fundamental concept of a set or series of eight.
Analysis
Structure: oct (eight) + ave (noun suffix)
oct is from Latin octo, meaning "eight". ave is a noun-forming suffix from Latin -avus, often used to form abstract nouns.
Examples
She has a remarkable vocal range of over three octaves.
The melody repeats an octave higher.
The poem is written in octaves.