Synonyms:
uneconomical, wasteful
Meaning: inefficient in use of time and effort and materials; "a clumsy and wasteful process"; "wasteful duplication of effort"; "uneconomical ebb and flow of power"
Usage examples
"Whoever did it was wasteful of other people's property."
In the same wasteful spirit, they had cooked, I suppose, three times more than we could eat; and one of them, with an empty laugh, threw what was left into the fire, which blazed and roared again over this unusual fuel.