perturb
to disturb greatly or unsettle
Roots
Other words with the turb root
- disturb: to interrupt peace or throw into disorder
- imperturbable: calm and not easily disturbed
- turbid: cloudy, muddy, or confused
- turbulent: stirred up, disorderly, or violently unsettled
Per- intensifies turb. To perturb is to stir something out of calm or order.
The unexpected graph perturbed her because it made the neat explanation look incomplete.