self-improvement

noun
🔊/ˌself ɪmˈpruːvmənt/
🔊/ˌself ɪmˈpruːvmənt/
[uncountable]
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  1. the process by which a person improves their knowledge, status, character, etc. by their own efforts(在知识、地位、性格等方面的)自我改进,自我提高