How to say "startling" in Japanese

• 驚天動地きょうてんどうち
  no-adjectiveCovers the grandest sense of 'startling': events or news so momentous they seem to shake the world. A fixed four-character idiom adding sweeping, dramatic emphasis, it is a less common choice and overkill for everyday surprises.
• 衝撃的しょうげきてき
  na-adjectiveFits 'startling' in the hard-hitting sense of shocking, devastating, gut-wrenching news or revelations that leave you stunned. A less common choice, it stresses the emotional impact on the person who receives it.
• 恐ろしいおそろしいJLPT N3approx.Common
  i-adjectiveThe common, everyday option, covering 'startling' as surprising or tremendous — something astonishing in degree or intensity. Its underlying sense of fear or dread often shades the surprise with a note of awe.

Use 「恐ろしい」 for the everyday sense of startling surprise or tremendous degree, 衝撃的 for shocking, hard-hitting news, and 驚天動地 for grand, world-shaking events — a less common four-character idiom with dramatic flair.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 驚天動地きょうてんどうちastounding
• 衝撃的しょうげきてきdevastating
• 恐ろしいおそろしいsurprising