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"deter" is also used as a crossword clue. If that's what you saw, the answer is often discourage (10 letters).
Definitions
turn away from by persuasion
Word origin
Borrowed from Latin dēterreō (“deter, discourage”), from de (“from”) + terreō (“to frighten”).
Used in a sentence
“Their boss deterred them from both taking holidays at the same time, claiming he couldn't manage it all on his own.”
“we have in following enquiry, attempted to throw some light upon subjects, from which uncertainty has hitherto deterred the wise”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Discourage”5 letters
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