I 'shudder' at the thought of what might happen. = 'I shudder to think' (of) what might happen. [=I am very worried/fearful about what might happen]
He 'shuddered' [='quivered, trembled'] 'with' fear when he heard the scream.
I felt a 'shudder' [='tremble'] in the floor as the truck drove by.
(..) (LAUGHS) (CHUCKLES) She glanced this way I thought I saw And when we touched She didn't shudder at my paw No, it can't be I'll just ignore But then she's never looked at me That way before (..)2017 Beauty and the Beast