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"uncaring" is also used as a crossword clue. If that's what you saw, the answer is often indifferent (11 letters).
Definitions
without care or thought for others
Word origin
From un- + caring.
Used in a sentence
“His uncaring attitude did not win him many friends.”
“To accomplish this end, each of the three components contains two levels: verbal caring and uncaring, nonverbal caring and uncaring, and technically competent and incompetent behavior.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Indifferent”8 letters
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