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Definition 2024

wastingly ‎(comparative more wastingly, superlative most wastingly)

In a way that causes wastage; wastefully.
- 1851, Herman Melville, Moby Dick, Scribner (1902), page 295:
  As in decapitating the whale, the operator's instrument is brought close to the spot where an entrance is subsequently forced into the spermaceti magazine; he has, therefore, to be uncommonly heedful, lest a careless, untimely stroke should invade the sanctuary and wastingly let out its invaluable contents.