unassuming

US /ˌʌn.əˈsuː.mɪŋ/
UK /ˌʌn.əˈsuː.mɪŋ/
1.

Khiêm tốn

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.