Senses
黑子 blemish
A black mole or birthmark; also used as a metaphor for a tiny piece of land.
黑子 black game piece
A black stone used in Go or a black piece used in Chinese chess.
黑子 sunspot
An area on the sun's surface that appears dark because it is cooler than its surroundings.
黑子 detractor
(slang) A hater or internet troll; someone who consistently criticizes or attacks a celebrity or public figure.
黑子 dark-skinned person
A lighthearted or joking nickname for someone with a dark complexion.