大姐
dà jiě · HSK 4
sister
👩🦰 大 = big + 姐 = older sister → big sister
大 (dà) means big/elder, and 姐 (jiě) means older sister. Together they literally form elder-older-sister. Also used as a polite address for any woman a bit older than you.
大 — pictograph of a person with arms outstretched
大 is a pictograph showing a person standing with arms and legs spread wide. The outstretched arms suggest 'big' or 'great', extending from the literal image of a large stance to abstract meanings like important or grand. It is one of the oldest characters, found on oracle bones.