耿耿于怀 (gěng gěng yú huái) | Meaning: to take troubles to heart (idiom); brooding | Chinese Idiom with Pinyin & Origin

deeply worried (idiom); to feel anxious牵肠挂肚qiān cháng guà dù

to keep in mind constantly (idiom)念念不忘niàn niàn bù wàng

engraved in one's heart and carved in one's bones (idiom); to remember a benefactor as long as one lives · undying gratitude铭心镂骨míng xīn lòu gǔ

to remember · to bear in mind · to learn by heart记住jì zhu

to yearn for sth day and night (idiom)朝思暮想zhāo sī mù xiǎng

to take troubles to heart (idiom); brooding