IPA: /ʌnˈvæljuːd/
KK: /ʌnˈvæl.jud/
Something that has not been given a value or is not considered important or appreciated.
The unvalued contributions of volunteers often go unnoticed.
Unvalued → It is formed from "un-" (meaning not) and "valued" (from Latin "valere", meaning to be strong or to be worth). The word "unvalued" means not considered to have worth or value.
Think of 'not' ('un-') having 'worth' ('valued') — that's why unvalued means something that is considered to have no worth.