Perturb is when something disrupts or throws off someone's plans, feelings, or stability. It can also mean to disturb someone from their usual state.
When we use perturb, we often talk about how an event or situation has caused trouble or made things difficult for people involved. Imagine you're planning a big concert and just as everything is ready to go, there's a sudden power outage. This would definitely perturb your plans! You might also hear someone say that their daily routine was perturbed by a noisy neighbor who started making too much noise early in the morning. In both cases, something unexpected came along and disrupted what was supposed to be smooth sailing.
To disturb; to bother or unsettle.
