IPA: /dɪˈstɜːbɪŋli/
KK: /dɪˈstɜrbɪŋli/
In a way that causes worry or concern.
The movie was disturbingly realistic, making many viewers uncomfortable.
Disturbingly → It is formed from "dis-" (meaning apart) and "turbare" (meaning to disturb or throw into confusion), combined with the suffix "-ly" (meaning in a manner). The word "disturbingly" means in a manner that causes disturbance or unease.
Think of something that causes a feeling of being 'apart' ('dis-') from comfort or peace, which is what 'disturbingly' conveys.