wasteful
//ˈweɪst.fəl//
Adjective
wastefulCanonical form
more wastefulComparative
most wastefulSuperlative
1
Using or expending resources carelessly or extravagantly; not economical.
Leaving the lights on all day is wasteful.
2
Causing or involving unnecessary loss or damage.
The old heating system was wasteful and caused unnecessary energy loss.