(bound form) pepper; spice plants, specifically referring to 花椒 huā​jiāo, 胡椒 hú​jiāo, or 辣椒 là​jiāo

(literary) the peak or top of a hill or mountain

(surname) Jiao

(archaic) a room in the palace of an empress, whose walls were traditionally plastered with pepper to provide warmth and fragrance