"wastefulness" in the noun sense
1. thriftlessness, waste, wastefulness
the trait of wasting resources
"a life characterized by thriftlessness and waste"
"the wastefulness of missed opportunities"
2. waste, wastefulness, dissipation
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"
Source: WordNet® (An amazing lexical database of English)
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