say it: WAYST-fuhl-nuhs
wastefulness is a noun meaning "the trait of wasting resources". It carries 2 recorded senses.
the trait of wasting resources
“a life characterized by thriftlessness and waste”
“the wastefulness of missed opportunities”
useless or profitless activity; using or expending or consuming thoughtlessly or carelessly
“if the effort brings no compensating gain it is a waste”
“mindless dissipation of natural resources”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for wastefulness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.