Sentence:  Thus fable reports that the fair Grimalkin, whom Venus, at the desire of a passionate lover, converted from a cat into a fine woman, no sooner perceived a mouse than, mindful of her former sport, and still retaining her <WSD>pristine</WSD> nature, she leaped from the bed of her husband to pursue the little animal. 
Meaning of the word marked with <WSD> tags:  Primitive, pertaining to the earliest state of something.