IPA: /θɜːrˈmoʊdʒənɪk/
KK: /θɜrˈmoʊdʒɛnɪk/
Relating to the process of producing heat in the body or in a substance.
Certain foods have thermogenic properties that can help boost metabolism.
Thermogenic is formed from "thermo-" (from Greek "thermos", meaning heat) and "genic" (from Greek "genes", meaning producing or generating). The word describes something that produces heat, particularly in the context of metabolism.
Think of 'heat' ('thermo-') being 'produced' ('genic') — that's why thermogenic refers to something that generates heat.