Antonyms for the word "causes ennui" include verbs that express actions or experiences that counteract or prevent boredom and listlessness. Such opposites include words like engage, stimulate, excite, energize, fascinate, thrill, captivate, animate, inspire, and invigorate. Engaging in activities like sports, traveling, socializing, reading, or learning a new skill can help ward off feelings of ennui. Listening to music, watching movies or performances, or exploring new places can also stimulate the mind and bring a sense of excitement and wonder. Thus, finding counterpoints to ennui can help us stay mentally refreshed and motivated.