IPA: /ˌhɛtəˈroʊdʒənəs/
KK: /hɛtəˈroʊdʒənəs/
Made up of different or diverse elements; not uniform in composition.
The research team studied a heterogenous group of participants from various backgrounds.
Heterogeneous → It is formed from "hetero-" (from Greek "heteros", meaning different) and "genus" (from Latin, meaning kind or type). The word describes a mixture or composition made up of different kinds or types.
Think of 'different' ('hetero-') kinds or types ('genus') coming together — that's what heterogeneous means.