Pend is a Scottish architectural term referring to a passageway that passes through a building, often from a street through to a courtyard, and typically designed for vehicular rather than exclusively pedestrian access.
A pend is distinct from a vennel or a close, as it has rooms directly above it, whereas vennels and closes are not covered over but rather are passageways between separate buildings.
The OED suggests that the etymology of the word is probably related to the archaic verb pend - "arch, arch over, vault", this in turn being derived from the French pendre, Latin pendēre "to hang"