What term refers to feelings that are exceedingly distressing?

The term "harrowingly" accurately describes feelings that are exceedingly distressing. It conveys a sense of severe emotional pain or trauma that is deeply unsettling. When something is described as harrowing, it often implies that the experience is not just distressing, but profoundly so, causing significant mental anguish or discomfort.

In contrast, the other terms present different nuances. "Disconcerting" relates to feelings of confusion or discomfort, but does not inherently carry the same intensity of distress. "Disturbingly" suggests something that causes unease, but may not reach the level of distress implied by "harrowingly." "Disorienting" refers to confusion or a lack of clarity in spatial, mental, or emotional contexts, rather than specifically focusing on emotional distress. Therefore, "harrowingly" is the most fitting choice when describing feelings that are exceedingly distressing.