IPA: //sʌbˈɛəriə//
KK: /sʌbˈɛr.i.ə/
A smaller region that is part of a larger area.
The city is divided into several subareas for better management.
Subarea → It is formed from "sub-" (meaning under or below) and "area" (from Latin "area", meaning a space or a region). The word "subarea" refers to a smaller area that is part of a larger area, indicating a division beneath the main area.
Think of something that is 'under' ('sub-') a larger 'space' ('area') — that's why a subarea is a smaller part of a larger area.