When you do something with intense enthusiasm, you do it zealously. Zealously cleaning the whole house is great — until you accidentally throw away your brother's prized bottle cap collection and your sister's science fair project. Oops.
If you're determined to reach a certain goal, you'll pursue it zealously. After campaigning zealously on behalf of child workers in the early 20th century, activists influenced the U.S. government to pass strong child labor laws.The adverb zealously comes from zeal, "passionate ardor in pursuit of an objective," and its Greek root, zēlos, "a noble passion."