Adverbs for Efficacious

ably; invaluably; surprisingly; unbelievably; uncommonly; remarkably; unusually; obviously; busily; incredibly; completely; sensibly; wisely; officiously; pleasantly; gracefully; politely; irritatingly; ostentatiously; horribly; satisfactorily; skilfully; expertly; cleverly; adroitly; ingeniously; shrewdly.