perturb
verb (used with object)
to disturb or disquiet greatly in mind; agitate.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
He had traveled without perturbment, it would seem, for his journeys had left no wrinkles on his bland forehead, neither was the light of restlessness in his quiet eyes.
From The Velvet Glove by Henry Seton Merriman