feebleness

plural feeblenesses

1. countableuncountableThe quality or state of being feeble; debility; infirmity.

   1 more example

   The traditional bourgeois ethic, puritan or secular, had ascribed [economic failure] to moral or spiritual feebleness rather than to lack of intellect, for it was evident that not much in the way of brains was needed for success in business, and conversely that mere brains did not guarantee wealth and still less ‘sound’ views.

   1975, Eric Hobsbawm, The Age of Capital. 1848-1875, published 1995, page 289