Perturbed means feeling worried or upset about something.
When people are perturbed, they often show it. You might hear them complain about the traffic jam that's causing their morning commute to take forever, or see them frowning at the news on their phone. But if someone asks how you're doing and you say you're a bit perturbed by an unexpected problem, they'll understand that you're feeling stressed out or annoyed, rather than being physically shaken or upset like you might be if you were frightened.
To disturb; to bother or unsettle.
Disturbed; flustered.
