- homonym; homophone; harmonic (component of sound)
- geology
- end of the world
- deluge; flood
- to be infatuated with
- tangled and complicated (idiom)
- to participate; to take part; to join
- symbol; mark; sign
- to coil around; knot; to entangle
- to know well; to be fully aware of
- mathematics
- importance
- self-study; to study on one's own
- Euclid of Alexandria (c. 300 BC), Greek geometer and author of the Elements 幾何原本|几何原本[Ji3 he2 Yuan2 ben3]
- proposition (logic, math.); to assign an essay topic
- 听 yǐn: 听 yin3: smile (archaic)听 tīng: 听 ting1: to listen to; to hear; to heed; to obey; a can (loanword from English "tin"); classifier for canned beverages; to let be; to allow (Taiwan pr. [ting4]); (literary) to administer; to deal with (Taiwan pr. [ting4])
- to talk about; to narrate; to give an account
- to repay; to requite
- polyhedron
- manuscript; original copy
- (idiom) extraordinary
- 馈 kùi: 馈 kui4: (literary) to make an offering to the gods馈 kùi: 馈 kui4: (bound form) to present (a gift); (bound form) to send; to transmit
- 礼 Lǐ: 礼 Li3: surname Li; abbr. for 禮記|礼记[Li3 ji4], Classic of Rites礼 lǐ: 礼 li3: gift; rite; ceremony; CL:份[fen4]; propriety; etiquette; courtesy
- chief executive; magistrate
- unaccounted; unknown whereabouts
- entire book; unabridged book
- sixty; 60
- sincere; solid
- 空心 kōng xīn: 空心 kong1 xin1: hollow; (of vegetables) to become hollow or spongy inside; (of a basketball) to swish through (not touching the hoop)空心 kòng xīn: 空心 kong4 xin1: on an empty stomach
- picture; figure; diagram; graph; depiction; graphical
- strip; item; article; clause (of law or treaty); classifier for long thin things (ribbon, river, road, trousers etc)
- to constitute; to form; to compose; to make up; to configure (computing)
- pyramid (geometry)
- rendering (computing); to add washes of ink or color to a drawing (Chinese painting); to exaggerate; to embellish
- net; web; network; to net; to catch with a net
- to suspend; to hang; (vehicle) suspension
- center of gravity; central core; main part
- gravity
- to view as; to see as; to consider to be; to deem
- toy; plaything
- knowledge; CL:門|门[men2]; intellectual
- circumference; circle