sweat

This word carries a strong association with physical toil and biological stress. It evokes a sense of grit, labor, and the raw biological response to pressure, whether that pressure is environmental heat or a demanding workload. It is often used in professional contexts to emphasize hard work and dedication, as in the phrase sweat equity. In a psychological sense, the term shifts from a physical secretion to a state of mental agitation. When used as a verb regarding worry, it suggests a feeling of being overwhelmed or overly concerned, often used in a casual or colloquial manner to tell someone to relax or stop stressing over trivialities.