IPA: //sʌbˈtɜːrmɪnəl//
KK: /sʌbˈtɜrmɪnəl/
Describing something that is located close to the end of a structure or area, but not exactly at the end.
The subterminal point of the railway line is just a few meters from the final station.
Subterminal → It is formed from "sub-" (meaning under or below) and "terminal" (from Latin "terminus", meaning boundary or end). The word "subterminal" refers to something that is located below a boundary or end point.
Think of something that is 'under' ('sub-') a 'boundary' or 'end' ('terminal') — that's why subterminal means below a terminal point.