二次方程
èr​cì​fāng​chéng

quadratic equation

二 èr two

Two horizontal strokes, representing the number two.

Character Evolution

Oracle form
Oracle Bone ~1250-1000 BC
Bronze form
Bronze Late Spring and Autumn ~500 BC
Bronze form
Bronze Warring States 475-221 BC
Bronze form
Bronze Warring States 475-221 BC
Seal form
Seal Warring States (Chu) 475-221 BC
Seal form
Seal Warring States (Chu) 475-221 BC
Seal form
Seal Shuowen ~100 AD
Seal form
Seal Shuowen ~100 AD
Clerical form
Clerical Qin 221-206 BC
Clerical form
Clerical Western Han 202 BC-9 AD
Clerical form
Clerical Eastern Han 25-220 AD
Clerical form
Clerical Eastern Han 25-220 AD
Regular Modern

Component uses

Meaning (4 of 8 verified)

些次再仁竺贰佞貳

Sound (1)

次

Simplified (1)

兰

Distinguishing (1)

亘

Iconic (1)

亙

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-SagartnyijHni[j]-s two

說文解字

《說文》：“二，地之數也。从偶一。弍，古文。”

Sources

Readings & variants
Unicode
Historical pronunciations
Baxter-Sagart
Historical images
Academia Sinica
Etymology
Shuowen Jiezi (說文解字)

次 cì second, next

The 二 (two) component represents the meaning "second" and also indicates the sound. The 欠 (deficient) represents the meaning "secondary" or "substandard".

Components

二
二 SoundMeaning component
èr two
Change in sound
欠
欠 Meaning component
qiàn, qian yawn, deficient

Alludes to the meaning "second-class" or "inferior".

Character Evolution

Oracle form
Oracle Bone ~1250-1000 BC
Oracle form
Oracle Bone ~1250-1000 BC
Bronze form
Bronze Early Western Zhou ~1000 BC
Bronze form
Bronze Mid Western Zhou ~900 BC
Bronze form
Bronze Late Spring and Autumn ~500 BC
Bronze form
Bronze Late Spring and Autumn ~500 BC
Seal form
Seal Xin 9-23 AD
Seal form
Seal Shuowen ~100 AD
Seal form
Seal Shuowen ~100 AD
Clerical form
Clerical Qin 221-206 BC
Clerical form
Clerical Qin 221-206 BC
Clerical form
Clerical Qin 221-206 BC
Clerical form
Clerical Eastern Han 25-220 AD
Clerical form
Clerical Eastern Han 25-220 AD
Regular Modern

Component uses

Sound (2 of 11 verified)

资姿茨瓷咨恣粢資趑佽絘

Meaning (0 of 1 verified)

趑

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-SagarttshijH[s-n̥]i[j]-s lodge (v.)
tshijH[s-n̥]i[j]-s put in order; second

說文解字

《說文》：“次，不前不精也。从欠，二聲。，古文次。”

Sources

Character origin
漢語多功能字庫
Readings & variants
Unicode
Historical pronunciations
Baxter-Sagart
Historical images
Academia Sinica
Etymology
Shuowen Jiezi (說文解字)

方 fāng, fang square

Original meaning: cutting edge

Depicts the cutting edge (一) of a knife blade (刀). Similar in origin to 亡. Based on the original meaning "cutting edge". The meaning later expanded to "perimeter", "area", and "square".

Components

刀
刀 Iconic component
dāo knife
Change in form
Due to historical stylistic changes, this component is less similar to 刀 than it was in ancient scripts.
一
一 Iconic component
yī one

Depicts the cutting edge of a knife.


Character Evolution

Oracle form
Oracle Bone ~1250-1000 BC
Oracle form
Oracle Bone ~1250-1000 BC
Oracle form
Oracle Bone ~1250-1000 BC
Oracle form
Oracle Bone ~1250-1000 BC
Oracle form
Oracle Bone ~1250-1000 BC
Bronze form
Bronze Late Shang ~1100 BC
Bronze form
Bronze Early Western Zhou ~1000 BC
Bronze form
Bronze Late Western Zhou ~800 BC
Bronze form
Bronze Late Western Zhou ~800 BC
Bronze form
Bronze Late Spring and Autumn ~500 BC
Bronze form
Bronze Late Warring States ~250 BC
Bronze form
Bronze Late Warring States ~250 BC
Bronze form
Bronze Qin 221-206 BC
Seal form
Seal Warring States (Chu) 475-221 BC
Seal form
Seal Qin 221-206 BC
Seal form
Seal Shuowen ~100 AD
Seal form
Seal Shuowen ~100 AD
Clerical form
Clerical Qin 221-206 BC
Clerical form
Clerical Western Han 202 BC-9 AD
Clerical form
Clerical Western Han 202 BC-9 AD
Clerical form
Clerical Eastern Han 25-220 AD
Clerical form
Clerical Eastern Han 25-220 AD
Clerical form
Clerical Eastern Han 25-220 AD
Regular Modern

Component uses

Sound (6 of 20 verified)

放房防旁访仿芳妨纺坊肪彷舫鲂枋钫邡訪紡昉

Meaning (2 of 11 verified)

旁旋旌旖旎枋旆旒旄邊旉

Unknown (0 of 4 verified)

愣楞塄堃

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-SagartpjangC-paŋ square
pjangpaŋ method
pjangpaŋ just, then

說文解字

《說文》：“方，併船也。象兩舟省緫頭形。汸，方或从水。”

Sources

Character origin
季旭昇《說文新證》p.685-686漢語多功能字庫
Readings & variants
Unicode
Historical pronunciations
Baxter-Sagart
Historical images
Academia Sinica
Etymology
Shuowen Jiezi (說文解字)

程 chéng sequence

Original meaning: unit of measurement

Phonosemantic compound. 禾 represents the meaning and 呈 represents the sound. Based on the original meaning "unit of measurement". The meaning later shifted to "rule", "procedure", "sequence", and "journey".

Components

禾
禾 Meaning component
hé grain stalk
Change in meaning
禾 hints at the original meaning of 程, "unit of measurement", which is no longer the most common meaning of 程 in modern Mandarin.
呈
呈 Sound component
chéng submit

Character Evolution

Bronze form
Bronze Early Spring and Autumn ~700 BC
Seal form
Seal Shuowen ~100 AD
Clerical form
Clerical Qin 221-206 BC
Clerical form
Clerical Western Han 202 BC-9 AD
Clerical form
Clerical Western Han 202 BC-9 AD
Clerical form
Clerical Eastern Han 25-220 AD
Clerical form
Clerical Eastern Han 25-220 AD
Regular Modern

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-Sagartdrjeng(C.)lreŋ Chéng (a surname)
drjengl<r>eŋ rule, norm

說文解字

《說文》：“程，品也。十髮為程，十程為分，十分為寸。从禾，呈聲。”

Sources

Character origin
漢語多功能字庫
Readings & variants
Unicode
Historical pronunciations
Baxter-Sagart
Historical images
Academia Sinica
Etymology
Shuowen Jiezi (說文解字)