shud·der 
/ˈʃʌdɚ/ verb
shud·ders; shud·dered; shud·der·ing /ˈʃʌdɚ/ verb [no obj] 1 of a person : to shake because of fear, cold, etc. — often + with ▪ He shuddered [=quivered, trembled] with fear when he heard the scream. — often used figuratively ▪ 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] 2 of a thing : to shake violently
▪ The old car shuddered to a halt. ▪ The house shuddered as a plane flew overhead.
▪ The old car shuddered to a halt. ▪ The house shuddered as a plane flew overhead.
— shudder noun, plural shudders [count]
▪ I felt a shudder [=tremble] in the floor as the truck drove by. ▪ a shudder of fear
▪ I felt a shudder [=tremble] in the floor as the truck drove by. ▪ a shudder of fear
