In the case of the world, the perturbation is very slight, and amounts only to a reversal of motion.
Other than this there was no 347 sign of perturbation on its owner's part.
In spite of his perturbation he had been amused for the moment.
Hephzy seized the opportunity to express to me her perturbation.
It was not sorrow, and it was not pain; it was anxiety, uncertainty, ...