(literary) the four limbs of the human body; the arms and legs

the four styles of Chinese calligraphy: ancient style, seal script, clerical script, and cursive script; also referred to as 四体书 sì​tǐ​shū

(literary) a metaphor for brothers, emphasizing their organic connection as parts of one body

(biology) an individual with four copies of a specific chromosome

(literary) an alternative name for 集句诗 jí​jù​shī (a poem composed entirely of lines from earlier works), specifically associated with the style of Wang Anshi

(literary) a metaphor for a monarch's closest advisors or high-ranking assistants