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"frightening" is also used as a crossword clue. If that's what you saw, the answer is often scary (5 letters).
Definitions
causing fear or dread or terror
Word origin
From frighten + -ing.
Used in a sentence
“Riding the rollercoaster was a frightening experience.”
“The Owl is flying high, frightening to the eye. The Rattler is nearby, Cool is on the fly. Danger is his business.”
“The scientist was frightening the timid children.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Terrible to face”11 letters
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