The word 'sub fuse' means to decrease or diminish the intensity of something. Its antonyms are words that convey the opposite meaning. These words include intensify, augment, amplify, magnify, reinforce, heighten, escalate, and enhance. These antonyms are useful when you want to express an increase in the intensity or strength of something. For example, you can use the antonym 'magnify' when describing the loudness of a sound. In contrast, when describing the softness of a sound, you can use the word 'sub fuse'. Using antonyms can help to provide a more nuanced and accurate description of a concept or idea.