span

The word evokes a sense of connection or coverage across a gap. Whether dealing with physical distance or time, it implies a continuous stretch that bridges two distinct points. In a spatial context, it often carries an architectural or engineering connotation, suggesting stability and reach (e.g., the span of a bridge). It differs from 'width' by emphasizing the act of crossing over a void. When applied to time, it describes a bounded duration. While 'duration' is neutral, 'span' often suggests a limit or a capacity, as seen in terms like "attention span" or "life span," where the focus is on how long something can possibly last before ending.