Perturb
Definition 1 of 3
Pro Tip 1/3
Emotional Weight
When 'perturb' is used, it suggests a mild to moderate level of disturbance, not an extreme one. He was perturbed by the constant buzzing but managed to focus.
Pro Tip 2/3
Temporary Effect
'Perturb' usually implies a temporary bother or disturbance, not a lasting problem. The flashing lights briefly perturbed her, then she ignored them.
Pro Tip 3/3
Neutral to Negative
The connotation of 'perturb' is neutral to negative; it's seldom positive. His indifferent attitude perturbed his concerned mother.