Un-remitting refers to something that is continuous and unrelenting. It can be used to describe a person's efforts, an organization's policies, or a weather pattern that doesn't let up. Antonyms of un-remitting would be intermittent, sporadic, or occasional, which refers to events or situations that come and go, with pauses in between. Another antonym would be abating or easing, which suggests a reduction in the intensity or frequency of something. Still, another antonym is desisting, which represents the cessation of an activity or behavior. These words are opposite in meaning to un-remitting and describe a break or a pause in a persistent activity or process.