lengthen

This term describes the act of extending a boundary, whether that boundary is a physical measurement or a temporal limit. It carries a neutral connotation of expansion, often implying a deliberate adjustment to meet a specific requirement or standard. When applied to time, it suggests a postponement of an end date or an expansion of a window of opportunity. In physical contexts, it typically refers to the addition of material or the stretching of an object to increase its linear dimension.