judder /judˈər/

1. A strong vibration in an aircraft or other mechanical apparatus
2. An intense, jerking motion
3. In singing, a vibratory effect produced by alternations of greater or less intensity of sound

To shake or vibrate

juddˈery adjective

• damper
• dampers
• dampest
• dampier
• dampiest
• damping
• damping-down
• damping-off
• dampings
• dampish
• dampishness
• dampishnesses
• damply
• dampness
• dampnesses
• damp-proof
• damp-proof course
• damp-proof courses
• damp-proofed
• damp-proofing
• damp-proofs
• damps
• damp squib
• damp squibs
• dampy