半衰期
bàn​shuāi​qī

half-life

半 bàn half

Depicts separating a cow (牛) into two halves (八).

Components

八
八 Iconic component
bā eight

Depicts splitting into two halves.

牛
牛 Iconic component
niú cow
Change in form
Due to historical stylistic changes, this component is less similar to 牛 than it was in ancient scripts.

Character Evolution

Bronze form
Bronze Qin 221-206 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
Regular Modern

Component uses

Sound (3 of 11 verified)

判伴叛胖畔衅绊拌袢泮絆

Meaning (0 of 1 verified)

畔

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-SagartpanHpˤan-s half

說文解字

《說文》：“半，物中分也。从八，从牛。牛為物大，可以分也。”

Sources

Character origin
季旭昇《說文新證》p.89-90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)

衰 shuāi decline

Original meaning: raincoat made from straw or grass

Depicts a woven raincoat (衣) made from either grass or straw. Based on the original meaning "raincoat made from straw or grass", now written as 蓑. The meaning later shifted to "weaken" and "decline".

Components

衣
衣 Iconic component
yī clothes
◎
◎ Iconic component
characterless component

Depicts woven grass or straw.


Character Evolution

Bronze form
Bronze Western Zhou 1045-771 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
Regular Modern

Component uses

Sound (0 of 2 verified)

蓑榱

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-Sagarttshwoj[s.r̥]ˤruj mourning clothes
tsrhjwe[tsʰ]roj reduce
srwijsruj diminish, decline

說文解字

《說文》：“衰，艸雨衣。秦謂之萆。从衣象形。，古文衰。”

Sources

Character origin
漢語多功能字庫季旭昇《說文新證》p.665-666zi.tools
Readings & variants
Unicode
Historical pronunciations
Baxter-Sagart
Historical images
Academia Sinica
Etymology
Shuowen Jiezi (說文解字)

期 qī period of time

Phonosemantic compound. 月 represents the meaning and 其 represents the sound.

Components

月
月 Meaning component
yuè, yue moon
其
其 Sound component
qí its, his, (3p possessive)

Character Evolution

Bronze form
Bronze Late Spring and Autumn ~500 BC
Bronze form
Bronze Late Spring and Autumn ~500 BC
Seal form
Seal Late Spring and Autumn ~500 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 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
Clerical form
Clerical Three Kingdoms (Cao Wei) 222-280 AD
Regular Modern

Historical Pronunciations

Middle ChineseOld ChineseGloss
Baxter-Sagartgi[g](r)ə period of time

說文解字

《說文》：“期，會也。从月，其聲。，古文期，从日、丌。”

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)