also: き
noun
10th Heavenly Stem; tenth sign of the sexagenary cycle
Refers to the tenth of the ten Heavenly Stems (十干), associated with the element water (水) and the yin aspect. Used in traditional calendars, astrology, and ranking systems.
癸は十干の最後の干です。
癸 is the last of the ten Heavenly Stems.
今年の干支は癸卯です。
This year's sexagenary sign is 癸卯 (Water Rabbit).
The character 癸 is an ancient Chinese Heavenly Stem. Its Japanese readings are き (on-reading) and みずのと (kun-reading, literally 'water's younger brother'), reflecting its association with water and yin.