Adjectives

(s)unspent, unexpended(of financial resources) not spent“unexpended funds”, “his unspent allowance”
(s)leftover, left over, left, odd, remaining, unexpendednot used up“leftover meatloaf”, “she had a little money left over so she went to a movie”, “some odd dollars left”, “saved the remaining sandwiches for supper”, “unexpended provisions”