elder sister
姉 centers on the concept of an elder sister, a female sibling older than oneself.
姉 combines 女 (woman) with 市, which likely contributes the sound and possibly the idea of a market or gathering, but the exact historical development is uncertain.
A woman 女 beside a market 市: imagine your elder sister taking you to the market, guiding you through the stalls.
For シ, picture your elder sister showing you how to shop at the market: she -> シ, and she is the one who knows the way.
older sister; elder sister
older sister; elder sister
sisters
(one's) older sister; (one's) elder sister
sister-in-law (spouse's older sister or older brother's wife)
cousin (female)
elder sister
elder sister
cousin (older female)
young lady (in ref. to a maid, etc.)
older sister
biological older sister; real elder sister
Sister (i.e. a nun; sometimes used as a posthumous suffix)
eldest sister
elder sister
eldest sister; oldest sister
weather girl; female TV weather presenter
older sister; elder sister
female underwear (esp. when transitioning from diapers); "big girl" panties
sitting on the floor with one's legs tucked under to one side