unassuming
adjective approving uk/ˌʌn.əˈsjuː.mɪŋ/ us/ˌʌn.əˈsuː.mɪŋ/
（人）不爱出风头的，谦逊的
Someone who is unassuming is quiet and shows no wish for attention or admiration
He was shy and unassuming and not at all how you expect an actor to be. 他腼腆低调，一点儿也不像你想象中的演员的样子。
Synonyms: bashfulcoy (MODEST)modest (QUIETLY SUCCESSFUL) reserved (PERSON)reticent retiring (SHY) self-effacingshy (NERVOUS)timid