the.com/joinery
the art of making wood hold hands so well it never needs nails
means The craft of joining pieces of wood together, especially the skilled construction of finely fitted wooden components like furniture, doors, and cabinetry.
from From the verb "join," which came into English through Old French "joindre," from Latin "iungere," to yoke or bind together — the same root that gives us "junction" and "conjugal." A "joiner" was the woodworker who fit pieces together by hand, distinct from the heavier carpenter; "joinery" is simply that worker's trade, the noun for the whole art of the fit.
no glueJapanese joints lock by friction and geometry alone
earthquake-proofFlexible joints let temples sway instead of snapping
dovetail strengthInterlocking tails resist pulling in every direction
ancient craftEgyptian furniture used mortise-and-tenon joints 5,000 years ago
secret locksSome Japanese joints hide invisible internal wedges