To place or arrange in a compact mass; to put in its proper place, or in a suitable place; to pack; as, to stowbags, bales, or casks in a ship's hold; to stow hay in a mow; to stow sheaves
If you stow something somewhere, you carefully put it there until it is needed. I helped her stow her bags in the boot of the car. to put or pack something tidily away in a space until you need it again = stash (stow (11-14 centuries), from )
[ 'stO ] (transitive verb.) 14th century. Middle English, to place, from stowe place, from Old English stOw; akin to Old Frisian stO place, Greek stylos pillar; more at STEER.