humble

他对于自己的成功非常谦虚。

He's very ___humble about his success.

她从卑微的出身一路崛起，成为了首相。

She rose from ___humble beginnings to become Prime Minister.

他从未忘记自己在西班牙一个小地区的卑微出身。

He never forgot his ___humble origins in a small region of Spain.