IPA: /dɪˈdʒɛkʃən/
KK: /dɪˈdʒɛkʃən/
A feeling of sadness or disappointment; a state of low spirits.
After hearing the bad news, she was filled with dejection.
Dejection → It is formed from "de-" (meaning down from or away) and "ject" (from Latin "jacere", meaning to throw). The word "dejection" refers to a state of being thrown down or feeling low in spirits.
Think of being 'thrown down' ('ject') and feeling 'away' ('de-') — that's why dejection means feeling low or sad.