four-volume

The compound adjective 'four-volume' is a straightforward modern English formation combining the cardinal number 'four' with the noun 'volume'. 'Four' traces back to the Proto-Indo-European root kʷetwóres, which gave rise to the number across many Indo-European languages, including Latin 'quattuor'. 'Volume' originates from the Latin 'volvere', meaning 'to roll', as ancient texts were written on scrolls. The literal combination, 'four rolled objects', evolved into the abstract modern meaning describing a publication physically divided into four distinct books or bound sections.

Structure: four (number) + volume (book) - four: From Old English 'fēower', of Proto-Germanic origin; related to Dutch 'vier' and German 'vier', from an Indo-European root shared by Latin 'quattuor' and Greek 'tessares'. Functions as a numerical quantifier. - volume: From Old French 'volume', from Latin 'volumen' (a roll, a book), from 'volvere' (to roll). Functions as the core noun denoting a book or a single book forming part of a larger work.