IPA: /ʌnˈrɛdi/
KK: /ʌnˈrɛdi/
Not prepared or not in a state to do something.
She felt unready for the exam despite studying all night.
Unready → It is formed from "un-" (meaning not) and "ready" (from Old English "ræde", meaning prepared or equipped). The word "unready" means not prepared or not equipped for something.
Think of 'not' ('un-') being added to 'prepared' ('ready') — that's why unready means not prepared.