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

• unarms
• unarranged
• unartful
• unartfully
• unarticulate
• unarticulated
• unartificial
• unartificially
• unartistic
• unartistlike
• unary
• unascendable
• unascended
• unascendible
• unascertainable
• unascertained
• unashamed
• unashamedly
• unasked
• unaspirated
• unaspiring
• unaspiringly
• unaspiringness
• unaspiringnesses
• unassailable