the.com/plywood

means A building material made of thin wood veneers glued together with their grain running at alternating angles, making it stronger and more stable than a single plank.

from From 'ply' (a layer or fold, from Old French 'plier,' to fold) plus 'wood.' The technique of gluing layered veneers goes back centuries — ancient Egyptians cross-layered wood for furniture — but the compound word 'plywood' itself is a 20th-century industrial coinage, arriving once cross-grained laminated boards became a standardized, mass-produced product.