IPA: /ˌmʌltiˈvɒljuːm/
KK: /mʌltiˈvɑljum/
Describing something that consists of several separate books or parts, usually related to a specific subject or theme.
The library has a multivolume set of encyclopedias that covers various topics in depth.
Multivolume → It is formed from "multi-" (meaning many) and "volume" (from Latin "volumen", meaning a roll or scroll). The word "multivolume" refers to a work that consists of many volumes or books.
Think of 'many' ('multi-') books or 'scrolls' ('volume') when you hear 'multivolume' — it describes a collection of multiple books.
No commonly confused words.