IPA: /ʌnˈrɛdiər/
KK: /ʌnˈrɛdiər/
Not prepared or not ready; in a state of unpreparedness.
She felt unreadier for the exam than she had the previous year.
Unreadier → It is formed from the prefix "un-" (meaning not) and the comparative form "readier" (from "ready" which comes from Old English *ræde*, meaning prepared or willing). The word "unreadier" means not more prepared or willing than something else.
Think of 'not' ('un-') being added to 'ready' to show that something is not more prepared than another. This helps you remember that 'unreadier' means not more ready.