Wiktionary
perturbingly
adv. In a manner that perturbs.
Usage examples of "perturbingly".
Of course, the island could be situated in the middle of a doldrum zone, which meant the winds were actually out there, somewhere over the perturbingly distant horizon.
Approximately, that is, about the time that Miss Ferrelyn Zellaby mentioned in the course of her almost daily correspondence with Mr Hughes that a tenuous suspicion had perturbingly solidified.
He was disturbed by the-fact that this pedestrian was clothed in a fashion as perturbingly unfamiliar as these houses and the spectacle he had witnessed.