IPA: //ʌnˈbækt//
KK: /ʌnˈbækt/
Not having support or backing; lacking assistance or resources.
The project was deemed unbacked and therefore could not proceed.
Unbacked → It is formed from "un-" (meaning not) and "back" (from Old English "bæc", meaning the rear or support). The word "unbacked" means not supported or lacking backing.
Think of something that is 'not' ('un-') supported ('back') — that's why unbacked means lacking support.