catharsis

The release of strong emotions, often through art, drama, or intense experience, bringing relief or renewal.

• cathartic/kəˈθɑːrtɪk/(adj)宣泄的
• cathartically/kəˈθɑːrtɪkli/(adv)以宣泄的方式

• emotional catharsis
• experience catharsis
• catharsis through art
• collective catharsis

1. 1.Writing the letter — even without sending it — provided a catharsis she hadn't expected. (emotional release)
2. 2.Aristotle argued that tragedy achieves catharsis by arousing pity and fear in the audience. (purification through art)

• release/rɪˈliːs/— letting go, general
• purgation/pɜːrˈɡeɪʃən/— cleansing, formal
• abreaction/ˌæbriˈækʃən/— psychoanalytic term for emotional discharge

from Greek "katharsis" (cleansing) — from "kathairein" (to purify) — same root as "catheter" (a cleansing tube)