overlap
UK: /ˌəʊvəˈlæp/ | US: /ˌoʊvərˈlæp/
v. to lie or extend over and cover part of something
v. to coincide partially in time or scope
n. an area or amount of overlap
The word "overlap" combines "over" (from Old English "ofer," meaning "above") and "lap" (from Old English "læppa," meaning "to fold or wrap"). Originally, "lap" referred to the loose part of a garment that could be folded over. By the 16th century, "overlap" emerged to describe the physical act of one thing covering part of another, later extending metaphorically to time or scope. The logic is clear: "over" implies spatial or conceptual superiority, while "lap" suggests folding or layering.
The tiles on the roof overlap to prevent leaks.
Our work schedules overlap by two hours.
There is some overlap between the two research studies.
The painter made sure the colors overlapped slightly for a smooth gradient.
Their responsibilities overlap, causing occasional confusion.