| 家信 | jiā xìn | letter (to or from) home |
| 宠信 | chǒng xìn | to dote on and trust |
| 自信心 | zì xìn xīn | self-confidence |
| 遗传信息 | yí chuán xìn xī | genetic information; heredity |
| 信从 | xìn cóng | to trust and obey |
| 信用证 | xìn yòng zhèng | letter of credit |
| 印信 | yìn xìn | official seal; legally binding seal |
| 报信 | bào xìn | to notify; to inform |
| 信仰 | xìn yǎng | to believe in (a religion); firm belief; conviction |
| 明信片 | míng xìn piàn | postcard |
| 不信任 | bù xìn rèn | mistrust |
| 不信任动议 | bù xìn rèn dòng yì | motion of no confidence (against the government, in parliamentary debates) |
| 不信任投票 | bù xìn rèn tóu piào | vote of no-confidence |
| 不信任案 | bù xìn rèn àn | no-confidence motion |
| 不信用 | bù xìn yòng | distrust |
| 不可撤销信用证 | bù kě chè xiāo xìn yòng zhèng | irrevocable letter of credit |
| 不可置信 | bù kě zhì xìn | unbelievable; incredible |
| 不敢相信 | bù gǎn xiāng xìn | unbelievable |
| 中信银行 | Zhōng xìn Yín háng | China CITIC Bank |
中国人权民运信息
中心 | Zhōng guó rén quán mín yùn xìn xī zhōng xīn | Information center for human rights and democracy, Hong Kong |
中国国防科技信息
中心 | Zhōng guó Guó fáng Kē jì Xìn xī Zhōng xīn | China Defense Science and Technology Information Center (CDSTIC) |
中国国际信托投资
公司 | Zhōng guó Guó jì Xìn tuō Tóu zī gōng sī | CITIC; Chinese International Trust and Investment Company |
| 中国移动通信 | Zhōng guó yí dòng tōng xìn | China Mobile (PRC state telecommunications company) |
| 互信 | hù xìn | mutual trust |
| 他信 | Tā xìn | Thaksin Shinawatra (1949-), Thai businessman and politician, prime minister 2001-2006 |
| 使人信服 | shǐ rén xìn fú | convincing |
| 信令 | xìn lìng | signaling (engineering) |
| 信仰者 | xìn yǎng zhě | believer |
| 信佛 | xìn Fó | to believe in Buddhism |
| 信使 | xìn shǐ | messenger; courier |
| 信使核糖核酸 | xìn shǐ hé táng hé suān | messenger RNA, mRNA |
| 信函 | xìn hán | letter; mailbox |
| 信口开河 | xìn kǒu kāi hé | to talk off the cuff (idiom); idle talk |
| 信口雌黄 | xìn kǒu cí huáng | to talk off the cuff (idiom); idle talk |
| 信噪比 | xìn zào bǐ | signal-to-noise ratio |
| 信报 | xìn bào | abbr. for 信报财经新闻, Hong Kong Economic Journal |
| 信报财经新闻 | xìn bào cái jīng xīn wén | Hong Kong Economic Journal |
| 信天翁 | xìn tiān wēng | albatross (family Diomedeidae) |
| 信孚中外 | xìn fú zhōng wài | to be trusted both at home and abroad (idiom) |
| 信守 | xìn shǒu | to abide by; to keep (promises etc) |
| 信宜 | Xìn yí | Xinyi county level city in Maoming 茂名, Guangdong |
| 信宜市 | Xìn yí shì | Xinyi county level city in Maoming 茂名, Guangdong |
| 信宿 | xìn sù | (ancient) to lodge for two nights |
| 信实 | xìn shí | to believe something to be true |
| 信州 | Xìn zhōu | Xinzhou district of Shangrao prefecture level city 上饶市, Jiangxi |
| 信州区 | Xìn zhōu qū | Xinzhou district of Shangrao prefecture level city 上饶市, Jiangxi |
| 信差 | xìn chāi | messenger |
| 信得过 | xìn de guò | trustworthy; reliable |
| 信德省 | Xìn dé shěng | Sindh province of Pakistan |
| 信息中心 | xìn xī zhōng xīn | information center; abbr. for Information center for human rights and democracy 中国人权民运信息中心, Hong Kong |
