IPA: /ˌdɪəˌrɛəlaɪˈzeɪʃən/
KK: /dɪˌrɪəlaɪˈzeɪʃən/
A psychological condition where a person feels that their surroundings are not real or seem strange and unfamiliar.
During the episode, she experienced derealization, making everything around her feel unreal.
Derealization → It is formed from "de-" (meaning down or away) and "real" (from Latin "realis", meaning actual or true) and the suffix "-ization" (meaning the process of). The word describes the process of feeling as if the world around you is not real or is distant from reality.
Think of the prefix 'de-' meaning 'away' and 'real' meaning 'true' — derealization is the process of feeling that reality is 'away' or not truly present.