IPA: /ˌʌnɪnˈrɪtʃt/
KK: /ʌnɪnˈrɪtʃt/
Not made richer or more valuable by adding something to it.
The soil in this area is unenriched, making it difficult for plants to grow.
Unenriched → It is formed from "un-" (meaning not) and "enrich" (from Old French *enrichir*, meaning to make rich). The word "unenriched" means not made rich or lacking in richness.
Think of 'not' ('un-') making something 'rich' ('enrich') — that's why unenriched means lacking richness.