IPA: //sʌbˈθiːm//
KK: /sʌbθim/
A specific topic or idea that is part of a larger topic or idea.
The book explores several subthemes, including friendship and betrayal.
Subtheme → It is formed from "sub-" (meaning under or below) and "theme" (from Greek "thema", meaning a subject or topic). The word "subtheme" refers to a secondary or underlying theme that exists beneath the main theme.
Think of a theme that is 'under' ('sub-') the main topic — that's what a subtheme represents.