The word unimpassionedly refers to doing something without any passion or enthusiasm. Its antonyms, on the other hand, are words that convey the opposite meaning of the word unimpassionedly. Some of the antonyms of the word unimpassionedly are ardently, passionately, zealously, fervently, and enthusiastically. If you are doing something ardently, it means that you are doing it with great passion and enthusiasm. Similarly, when you are doing something zealously, you are doing so with intense enthusiasm and eagerness. Fervently also means with intense passion, and enthusiastically means doing something with energy and excitement. When you use these antonyms of unimpassionedly in your writing, you convey a sense of passion, enthusiasm, and energy, which can make your writing more engaging and persuasive.