IPA: /ˌʌn.rɪˈdiːmd/
KK: /ʌnˈridimd/
Describing something that has not been used or fulfilled, such as a coupon that remains valid but has not been spent, or a person who has not received redemption or salvation.
The unredeemed coupons can still be used until the end of the month.
Unredeemed → It is formed from "un-" (meaning not) and "redeem" (from Latin "redimere", meaning to buy back or recover). The word "unredeemed" means not having been bought back or recovered, often referring to something that remains in its original state without restoration or salvation.
Think of 'not' ('un-') having been 'bought back' ('redeem') — that's why unredeemed means something that hasn't been recovered or restored.