The phrase "most hairtrigger" describes something that is extremely sensitive or reactive, but what are the opposite words? Antonyms for this phrase could include "least sensitive," "least reactive," or "calm." These words suggest a lack of quick responses or an ability to remain composed in stressful situations. Other antonyms might include "unresponsive," "unimpressionable," or "reserved." These words imply an emotional detachment or lack of reaction altogether. When looking for antonyms for "most hairtrigger," it's helpful to consider words that describe the opposite of sensitivity and reactivity, such as calmness, detachment, and stoicism.