| 骨头 | gǔ tou | bone / CL:根[gen1],塊|块[kuai4] / moral character / bitterness / Taiwan pr. [gu2 tou5] |   |
| 恨意 | hèn yì | rancor / hatred / bitterness / resentfulness | |
| 苦味 | kǔ wèi | bitter taste / bitterness | |
| 幽怨 | yōu yuàn | hidden bitterness / secret grudge | |
| 苦海 | kǔ hǎi | lit. sea of bitterness / abyss of worldly suffering (Buddhist term) / depths of misery | |
| 苦尽甘来 | kǔ jìn gān lái | bitterness finishes, sweetness begins (idiom) / the hard times are over, the good times just beginning | |
| 苦大仇深 | kǔ dà chóu shēn | great bitterness, deep hatred (idiom) / deeply ingrained long-standing resentment | |
| 苦海茫茫 | kǔ hǎi máng máng | sea of bitterness is vast (idiom) | |
| 苦海无边，回头是岸 | kǔ hǎi wú biān , huí tóu shì àn | The sea of bitterness has no bounds, turn your head to see the shore (idiom). Only Buddhist enlightenment can allow one to shed off the abyss of worldly suffering. / Repent and ye shall be saved! | |
| 苦大仇深 | kǔ dà - chóu shēn | (idiom) great bitterness and deep hatred / deeply ingrained long-standing resentment | |
