Usage patterns
謙虚な人a modest/humble person
Even after his success, he remains a humble person.
謙虚な態度a humble/modest attitude
She always treats people with a modest attitude.
謙虚に〈動詞〉to (do something) humbly
He listens to others' opinions humbly.
謙虚さを失うto lose one's humility
I hope you won't lose your humility even after becoming famous.