His parents split up when he was eight, which he found very traumatic.

### 解释 traumatic 是形容词，来自名词 trauma（创伤、精神创伤），后缀 -tic 表示"与...相关的"。traumatic 意思是"造成精神创伤的、令人痛苦的"，描述那些给人带来严重心理冲击的经历或事件。