doorjamb; doorpost; vertical frame member
Technical term in architecture and carpentry for the vertical framing piece on either side of a door or window opening. Not an everyday word; used in construction, design, and traditional woodworking contexts.
The doorjambs of this fitting are made of cypress.
If you get the dimensions of the vertical frame wrong, the door won't close properly.
Standard kanji spelling for the vertical frame member of a door or window.
Alternate kanji for 縦; both are used in architectural contexts.
Compound of 縦 (たて, 'vertical') and 框 (がまち, 'frame, jamb'). The reading がまち is a specialized carpentry term for frame members.