derivative Antonyms

hard to come by unborrowed ultimate sire root radical primary precursor originative original new inventive integral ill-advised underived firsthand fresh from the oven fun-filled highly developed unthoughtful underivative ill-considered colourful blimy blimey antiderivative ill-conceived harebrained inflectional improvident improper fictive fable esemplastic creative crazy coincidental clever celestial careless brash authentic amazing flippant foolhardy foolish impolitic ill-judged ignorant hot-headed