Antonyms are words that have opposite meanings. For the word "athletic event," the antonyms could be "sedentary activity" or "non-physical competition." Sedentary activities include reading, watching TV, or playing board games, whereas non-physical competitions could be academic or strategic games like chess, quizzes or debates. These activities do not require physical strength or endurance, unlike athletic events such as running, swimming, or playing basketball. However, it is important to note that all activities contribute to maintaining a healthy lifestyle, physically or mentally, and should be valued accordingly.