plank door; solid wooden door without frame
A traditional Japanese door made of one or several wooden planks, without a separate door framework. Often contrasted with 桟唐戸 (a framed door). Used in historical or architectural contexts.
See also: 桟唐戸
The plank door of the old temple is made of a single thick board.
Please explain the difference between a plank door and a framed door.
Compound of 板 (ita, 'board, plank'), 唐 (kara, here meaning 'Chinese style' or 'foreign'), and 戸 (to, 'door'). The exact historical derivation is uncertain, but the term refers to a traditional solid-plank door style.