IPA: /ˌʌnˈjuːtəlaɪzd/
KK: /ʌnˈjuːtəˌlaɪzd/
Not used or not put to use; something that remains unused or ineffective.
The unutilized resources in the warehouse could be better allocated to meet the demand.
Unutilized → It is formed from "un-" (meaning not) and "utilized" (from Latin "utilis", meaning useful, and the suffix "-ize", meaning to make). The word "unutilized" means not made useful or not put to use.
Think of 'not' ('un-') making something 'useful' ('utilis') — that's why unutilized means something that is not being used.