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"wasteful" is also used as a crossword clue. If that's what you saw, the answer is often prodigal (8 letters).
Definitions
Using more resources, money, or effort than necessary.
Word origin
From Middle English wastful; equivalent to waste + -ful.
Used in a sentence
“Shortly vnto the vvaſtefull vvoods ſhe came, / VVhereas ſhe found the Goddeſſe vvith her crevv, […]”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Squandering”8 letters
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