the.com/fastening
The art of convincing two separate things they were always meant to be one.
means The act of securing things together, or the device that does it — buttons, zips, clasps, and their kin.
from From Old English 'faest', meaning firm or fixed — the same root that makes you stand 'fast' and hold 'fast', refusing to budge.
Velcro originInspired by burrs clinging to a dog's fur.
Zipper lagNamed 'zipper' decades after its 1893 invention.
Button historyDecorative for millennia before holding anything shut.