A person's true feelings or real intentions; what someone genuinely feels beneath appearances.
彼女の本心は別のところにあるようだ。
It seems her true feelings lie elsewhere.
会議では賛成していたが、本心は反対だった。
She agreed in the meeting, but her true feelings were opposed.
本心からお礼を言いたい。
I want to thank you from the bottom of my heart.
One's right mind, sense, or conscience—referring to proper judgment or moral sense (somewhat formal).
事故の後、彼はしばらく本心を取り戻せなかった。
After the accident he was unable to regain his senses for a while.
本心に照らしてその行為を考え直すべきだ。
You should reconsider that action in light of your conscience.