Homonym: thresholds (Limit)
A threshold is a point or level at which something begins or changes. It can refer to various contexts, such as a physical boundary, like the entrance to a room, or a metaphorical limit, like the minimum amount of stress a person can handle before feeling overwhelmed.
In scientific terms, thresholds are often used to describe the minimum stimulus required to trigger a response, such as the pain threshold in biology, which indicates the point at which a stimulus becomes painful. Understanding thresholds helps in fields like psychology, medicine, and environmental science.