IPA: //ˈsʌbˌlɛvəl//
KK: /sʌbˈlɛvəl/
An intermediate level or layer that exists between other levels, often used in contexts like mining or organization.
The miners discovered a new sublevel that contained valuable minerals.
Sublevel → It is formed from "sub-" (meaning under or below) and "level" (from Old French *level*, meaning a flat or even surface). The word "sublevel" refers to a level that is situated below another level.
Think of something that is 'under' ('sub-') a flat surface ('level') — that's why sublevel means a level below another.