Antonyms for the term "more reactive" suggest a lack of responsiveness or sensitivity. The opposite of being reactive could be being passive, unresponsive, or even uninterested. Some antonyms that could be associated with "more reactive" include inactive, indifferent, unresponsive, lethargic, and apathetic. For instance, a person can be less reactive and more passive, less interested and more indifferent. Alternatively, antonyms could suggest lower levels of intensity or extreme features, such as calmer, milder, or even less aggressive. The context determines the right antonym for "more reactive" as the word could be used to describe various situations, including chemical reactions, emotional responses, or physical movements.