IPA: /dɪˈdʒɛktɪdli/
KK: /dɪˈdʒɛktɪdli/
In a way that shows sadness or disappointment.
She looked dejectedly at the ground after hearing the bad news.
Dejectedly → It is formed from "de-" (meaning down or away) and "ject" (from Latin "jacere", meaning to throw). The suffix "-ly" indicates the manner of the action. Thus, "dejectedly" means to act in a manner that is thrown down or cast down, reflecting a state of sadness or disappointment.
Think of being 'thrown down' ('de-' means down and 'ject' means to throw) to remember that 'dejectedly' describes acting in a sad or downcast manner.