The phrase "wearing on" commonly refers to how something, such as an event or situation, is gradually becoming more tiresome or burdensome over time. Synonyms for this phrase include "grinding down," "dragging on," "weighing heavily," "depleting," and "fatiguing." Other possible synonyms are "exhausting," "taxing," "sapping," "draining," "tiring," and "demanding." These words all describe how a certain task or experience can gradually erode one's energy and enthusiasm, potentially leading to feelings of frustration or burnout. They are useful for expressing a sense of weariness or exhaustion, and can be used in a variety of settings, such as describing a difficult work project or a tedious routine.