introspection
noun [ U ] uk/ˌɪn.trəˈspek.ʃən/ us/ˌɪn.trəˈspek.ʃən/
自省，反省
examination of and attention to your own ideas, thoughts, and feelings
His defeat in the world championship led to a long period of gloomy introspection. 世界锦标赛上失败后，他长期处于郁郁寡欢和自我反省之中。