| 1 | 思想 | 思想 | sī xiǎng | si1 xiang3 | thought; thinking; idea; ideology; Classifiers: 个 | | |
| 2 | 马克思主义 | 馬克思主義 | mǎ kè sī zhǔ yì | Ma3 ke4 si1 zhu3 yi4 | Marxism | | |
| 3 | 马克思 | 馬克思 | mǎ kè sī | Ma3 ke4 si1 | Marx (name) | | |
| 4 | 思考 | 思考 | sī kǎo | si1 kao3 | to reflect on; to ponder over | | |
| 5 | 思索 | 思索 | sī suǒ | si1 suo3 | to think deeply; to ponder | | |
| 6 | 毛泽东思想 | 毛澤東思想 | máo zé dōng sī xiǎng | Mao2 Ze2 dong1 Si1 xiang3 | Mao Zedong Thought; Maoism | | |
| 7 | 沉思 | 沉思 | chén sī | chen2 si1 | to contemplate; to ponder; contemplation; meditation | | |
| 8 | 马克思列宁主义 | 馬克思列寧主義 | mǎ kè sī liè níng zhǔ yì | Ma3 ke4 si1 Lie4 ning2 zhu3 yi4 | Marxism-Leninism | | |
| 9 | 思 | 思 | sī | si1 | to think; to consider | | |
| 10 | 思潮 | 思潮 | sī cháo | si1 chao2 | tide of thought; way of thinking characteristic of a historical period; Zeitgeist | | |
| 11 | 构思 | 構思 | gòu sī | gou4 si1 | to design; to plot; to plan out; to compose; to draw a mental sketch; conception; plan; idea; composition | | |
| 12 | 思路 | 思路 | sī lù | si1 lu4 | train of thought; thinking; reason; reasoning | | |
| 13 | 思想家 | 思想家 | sī xiǎng jiā | si1 xiang3 jia1 | thinker | | |
| 14 | 思念 | 思念 | sī niàn | si1 nian4 | to think of; to long for; to miss | | |
| 15 | 成吉思汗 | 成吉思汗 | chéng jí sī hán | Cheng2 ji2 si1 han2 | Genghis Khan (1162-1227), founder and ruler of the Mongol Empire | | |
| 16 | 思想体系 | 思想體系 | sī xiǎng tǐ xì | si1 xiang3 ti3 xi4 | system of thought; ideology | | |
| 17 | 深思 | 深思 | shēn sī | shen1 si1 | to ponder; to consider | | |
| 18 | 抽象思维 | 抽象思維 | chōu xiàng sī wéi | chou1 xiang4 si1 wei2 | abstract thought; logical thinking | | |
| 19 | 思绪 | 思緒 | sī xù | si1 xu4 | train of thought; emotional state; mood; feeling | | |
| 20 | 不可思议 | 不可思議 | bù kě sī yì | bu4 ke3 si1 yi4 | inconceivable (idiom); unimaginable; unfathomable | | |
| 21 | 反思 | 反思 | fǎn sī | fan3 si1 | to think back over sth; to review; to revisit; to rethink; reflection; reassessment | | |
| 22 | 思想意识 | 思想意識 | sī xiǎng yì shí | si1 xiang3 yi4 shi2 | consciousness | | |
| 23 | 赛轮思 | 賽輪思 | sài lún sī | Sai4 lun2 si1 | Cerence, US company providing AI-based automotive assistants | | |
| 24 | 无思无虑 | 無思無慮 | wú sī wú lǜ | wu2 si1 wu2 lu:4 | (idiom) carefree; untroubled | | |
| 25 | 巧思 | 巧思 | qiǎo sī | qiao3 si1 | innovative thinking; ingenuity | | |