NSW Selective & Scholarship
Perturb
verb/puh-TURB/
To make someone feel worried, anxious or unsettled.
In contextNothing seemed to perturb her, even the day before the big exam.
Remember it
Perturb hides 'turb', as in turbulence; it stirs up a calm mind.
Use it well
Use for causing unease or worry; often seen as 'perturbed' to describe a troubled feeling.