the.com/resourcefulness

means The knack for solving problems with whatever's on hand, rather than what you wish you had.

from Traces back to 'resource,' from French 'ressource,' built on 'resourdre' — to rise again, to spring up anew — itself rooted in Latin 'resurgere' (yes, the ancestor of 'resurrect'). So a resource was literally something that rises again to help you, a reserve that springs back up when you need it. Add '-ful' and '-ness' and you get the state of being well-stocked with these rising reserves — not in your pockets, but in your wits.