The word "re-actions," which refers to the responses or reflexes to a certain situation, has several antonyms. One antonym for "re-actions" could be "inaction," which refers to the lack of response or activity in a situation. Another antonym could be "indifference," which means a lack of concern or interest in something that happens. "Nonchalance" also serves as an antonym to "re-actions," which relates to a casual, carefree, or relaxed response to a challenging situation. Other antonyms for the word may include abstention, passivity, unconcern, and disinterest. The appropriate antonym for reactions depends on the context and the nature of the actions undertaken.