☉ 亏心 【kuīxīn】
　　[ have a guilty conscience ] 感觉到自己的言行违背事理 问心有愧。

☉ 理亏心虚 【lǐkuīxīnxū】
　　[ feel apprehensive because one is not on solid ground be not on solid ground have a guility conscience because justice is not on one's side ] 因理由不充分而担心。