at heart
US /æt hɑːrt/
UK /æt hɑːt/
慣用句
根は, 心は
in one's true character or innermost feelings, as opposed to one's outward appearance or behavior
例:
•
He seems tough on the outside, but he's a kind person at heart.
彼は外見は厳しそうに見えるが、根は優しい人だ。
•
Despite her serious demeanor, she's still a child at heart.
彼女は真面目な態度にもかかわらず、根はまだ子供だ。