If you say that something is ~ on your mind or memory or on your heart, you are emphasizing that you will never forget it, because it has made a very strong impression on you.
Her image is ~ upon my heart...
ADJ: v-link ADJ in/on/upon n emphasis
If you say that something is ~ on your mind or memory or on your heart, you are emphasizing that you will never forget it, because it has made a very strong impression on you.
Her image is ~ upon my heart...
ADJ: v-link ADJ in/on/upon n emphasis
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012