godan verb (-su), transitive verb
reload; restack; repile
To load, stack, or pile something again, often because the initial arrangement was unsatisfactory or the load shifted.
トラックの荷物が崩れたので、積み直さなければならない。
The cargo on the truck collapsed, so we have to reload it.
本棚の本
I neatly restacked the books on the bookshelf.