startling
Definitions
Causing momentary fright, surprise, or astonishment.
Very surprising, remarkable, or striking.
Examples
The sudden noise made a startling impact on the quiet room.
She made the startling discovery that her keys had been missing for weeks.
There was a startling increase in the number of applicants this year.
Synonyms
astonishing surprising shocking stunning alarming startlingly unexpected
Antonyms
expected predictable ordinary common unremarkable boring dull