| 忠实 | zhōng shí | faithful |   |
| 不渝 | bù yú | constant / unchanging / abiding / faithful | |
| 守节 | shǒu jié | faithful (to the memory of betrothed) / constant (of widow who remains unmarried) | |
| 谌 |  chén | faithful / sincere | |
| 忠心耿耿 | zhōng xīn gěng gěng | loyal and devoted (idiom) / faithful and true | |
| 怦怦 | pēng pēng | thumping sound (onom.) / to be eager and anxious (to do sth) / faithful and upright | |
| 忠臣 | zhōng chén | faithful official | |
| 忠信 | zhōng xìn | faithful and honest / loyal and sincere | |
| 从一而终 | cóng yī ér zhōng | faithful unto death (i.e. Confucian ban on widow remarrying) | |
| 苏武 | Sū Wǔ | Su Wu (140-60 BC), Han Dynasty diplomat and statesman, regarded as a model of courage and faithful service | |
| 忠贞不渝 | zhōng zhēn bù yú | unswerving in one's loyalty (idiom) / faithful and constant | |
| 坚贞不屈 | jiān zhēn bù qū | faithful and unchanging (idiom) / steadfast | |
| 碧海青天 | bì hǎi qīng tiān | green sea, blue sky (idiom) / sea and sky merge in one shade / loneliness of faithful widow | |
| 三贞九烈 | sān zhēn jiǔ liè | (of a widow) faithful to the death to her husband's memory | |
| 照原样 | zhào yuán yàng | to copy / to follow the original shape / faithful restoration | |
| 禁欲、专一、避孕套 | | Abstain, Be faithful, use a Condom / ABC approach | |
| ABC法 | ABCfǎ | Abstain, Be faithful, use a Condom / ABC approach | |
| 忠君爱国 | zhōng jūn ài guó | to be faithful to the ruler and love one's country (idiom) | |
| 守一而终 | shǒu yī ér zhōng | to be faithful to one's mate all one's life | |
| 死节 | sǐ jié | to die or be martyred for a noble cause / to be faithful unto death | |
| 犬马之劳 | quǎn mǎ zhī láo | lit. the service of a dog or a horse (idiom) / fig. faithful service | |
| 生聚教训 | shēng jù jiào xùn | to increase the population, amass wealth, and teach the people to be faithful to the cause (in preparation for war, following a defeat) | |
