addled

1 :  thrown into confusion :  confused his addled brain/mind … vainly endeavouring to master some task … which, to the addled brain of the crushed boy of nineteen, was a sealed and hopeless mystery. — Charles Dickens

2 of an egg :  rotten, addle She was romantic, she was sentimental, she had a passion for little secrets and mysteries—a very innocent passion, for her secrets had hitherto always been as unpractical as addled eggs. — Henry James