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"lightly" is also used as a crossword clue. If that's what you saw, the answer is often playfully (9 letters).
Definitions
with indifference or without dejection
Word origin
From Middle English lyghtly, liȝtliche, lihtliche, from Old English lēohtlīċe, equivalent to light + -ly.
Used in a sentence
“As a teacher, I don't take rudeness in class lightly.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“With little force”7 letters
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