IPA: /ˌhɛtəˈrɒtrəfi/
KK: /hɛtəˈrɑtrəfi/
A condition in which an organism cannot produce its own food and relies on consuming other organisms for energy and nutrients.
Humans are an example of heterotrophy because we eat plants and animals for sustenance.
Heterotrophy → It is formed from "hetero-" (from Greek "heteros", meaning different) and "trophy" (from Greek "trophē", meaning nourishment or feeding). The word describes a mode of nutrition where organisms obtain their food from different sources, as opposed to producing it themselves.
Think of 'different' ('hetero-') ways of 'nourishing' ('trophy') oneself — that's what heterotrophy means.
No commonly confused words.