| 1 | 思想 | 思想 | sī xiǎng | si1 xiang3 | thought; thinking; idea; ideology; Classifiers: 个 | | |
| 2 | 思考 | 思考 | sī kǎo | si1 kao3 | to reflect on; to ponder over | | |
| 3 | 思索 | 思索 | sī suǒ | si1 suo3 | to think deeply; to ponder | | |
| 4 | 思 | 思 | sī | si1 | to think; to consider | | |
| 5 | 思潮 | 思潮 | sī cháo | si1 chao2 | tide of thought; way of thinking characteristic of a historical period; Zeitgeist | | |
| 6 | 思路 | 思路 | sī lù | si1 lu4 | train of thought; thinking; reason; reasoning | | |
| 7 | 思想家 | 思想家 | sī xiǎng jiā | si1 xiang3 jia1 | thinker | | |
| 8 | 思念 | 思念 | sī niàn | si1 nian4 | to think of; to long for; to miss | | |
| 9 | 思想体系 | 思想體系 | sī xiǎng tǐ xì | si1 xiang3 ti3 xi4 | system of thought; ideology | | |
| 10 | 思绪 | 思緒 | sī xù | si1 xu4 | train of thought; emotional state; mood; feeling | | |
| 11 | 思想意识 | 思想意識 | sī xiǎng yì shí | si1 xiang3 yi4 shi2 | consciousness | | |
| 12 | 思惟 | 思惟 | sī wéi | si1 wei2 | (line of) thought; thinking; variant of 思维 | | |
| 13 | 思议 | 思議 | sī yì | si1 yi4 | to imagine; to comprehend | | |
| 14 | 思想交流 | 思想交流 | sī xiǎng jiāo liú | si1 xiang3 jiao1 liu2 | exchange of ideas | | |
| 15 | 思想史 | 思想史 | sī xiǎng shǐ | si1 xiang3 shi3 | intellectual history | | |
| 16 | 思想库 | 思想庫 | sī xiǎng kù | si1 xiang3 ku4 | think tank (committee set up to study a problem) | | |
| 17 | 思想顽钝 | 思想頑鈍 | sī xiǎng wán dùn | si1 xiang3 wan2 dun4 | blunt thinking; apathy | | |
| 18 | 思维地图 | 思維地圖 | sī wéi dì tú | si1 wei2 di4 tu2 | mind map | | |
| 19 | 思维导图 | 思維導圖 | sī wéi dǎo tú | si1 wei2 dao3 tu2 | mind map | | |
| 20 | 思乡病 | 思鄉病 | sī xiāng bìng | si1 xiang1 bing4 | homesick; homesickness | | |
| 21 | 思亲 | 思親 | sī qīn | si1 qin1 | to remember one's parents; to feel homesick for one's relatives | | |
| 22 | 思前想后 | 思前想後 | sī qián xiǎng hòu | si1 qian2 xiang3 hou4 | to consider past cause and future effect (idiom); to think over the past and future; to ponder over reasons and connection | | |
| 23 | 思深虑远 | 思深慮遠 | sī shēn lǜ yuǎn | si1 shen1 lu:4 yuan3 | to think deeply and far ahead (idiom) | | |
| 24 | 思惹情牵 | 思惹情牽 | sī rě qíng qiān | si1 re3 qing2 qian1 | to be a prisoner of love (idiom) | | |
| 25 | 思情 | 思情 | sī qíng | si1 qing2 | to miss; to long for | | |