心底xīndǐbottom of one's heart; innermost feelingsHSK 6PronunciationxīndǐExample sentence他从心底感激那位帮助过他的老师。Tā cóng xīndǐ gǎnjī nà wèi bāngzhù guò tā de lǎoshī.He felt grateful from the bottom of his heart toward the teacher who had helped him.Read and choose an answerOne fixed sampleExplore a sample