IPA: /ˌmʌltiˈriːdʒənl/
KK: /mʌltiˈridʒənl/
Relating to or involving multiple regions.
The company has a multiregional strategy to expand its market presence.
Multiregional → It is formed from "multi-" (meaning many) and "regional" (from Latin "regio", meaning region). The word "multiregional" refers to something that pertains to or involves many regions.
Think of 'many' ('multi-') regions ('regional') to remember that 'multiregional' means related to multiple areas.
No commonly confused words.