Synonyms:
extravagantly, lavishly
Meaning: in a wasteful manner; "the United States, up to the 1920s, used fuel lavishly, mainly because it was so cheap"
Usage examples
The present hidden under the paper wrapper was a sixpenny picture-book. Kitty's grandmother disapproved of spending money lavishly on birthday gifts to children.
In its temple tower, built of brick, was a marble stairway, and evidences have been forthcoming that in the later Sumerian period the structure was lavishly adorned.