IPA: /ʌnˈspɛnt/
KK: /ʌnˈspɛnt/
Describing something that has not been used or expended, especially in terms of money or resources.
The unspent funds will be carried over to next year's budget.
Unspent → It is formed from "un-" (meaning not) and "spent" (from Old French *despendre*, meaning to spend or expend). The word "unspent" means not having been spent or used up.
Think of 'not' ('un-') having been 'used up' ('spent') — that's why unspent means something that hasn't been used.