guǐ
10th heavenly stem
Original meaning:
a type of weapon
Possibly depicts a type of ancient weapon with three points on it. Based on the original meaning "a type of weapon", now written as 戣. The current meaning is a phonetic loan.
Evolution

Oracle script
(~1250-1000 BC)
Bronze script
Late Shang dynasty (~1100 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Most common words with 癸
Freq. | Word | Meaning |
---|---|---|
deca | ||
fortieth year J4 of the 60 year cycle, e.g. 1963 or 2023 | ||
twentieth year J8 of the 60 year cycle, e.g. 2003 or 2063 | ||
fiftieth year J2 of the 60 year cycle, e.g. 1973 or 2033 | ||
tenth year J10 of the 60 year cycle, e.g. 1993 or 2053 |
Sources
季旭昇《說文新證》p.969-970
何琳儀《戰國古文字典:戰國文字聲系》p.1189