Interlocking boards joined together by a tongue cut along the edge of one board and fitting into a groove along the edge of another.
企口板
as modifiera matchboard door
Definition of matchboard in US English:
matchboard
nounˈmaCHbôrdˈmætʃbɔrd
Any of a set of interlocking boards joined together by a tongue cut along the edge of one board and fitting into a groove along the edge of another. Also called matched board.