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黒星 (くろぼし, kuroboshi) Japanese meaning: black spot | Kotomora
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いる
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A black dot is drawn at the center of the target.
Usage patterns 〈 人ひと 〉 に 黒くろ 星ぼし をつける to hand someone a defeat
It was a rookie wrestler who handed the grand champion a loss.
黒くろ 星ぼし が 続つづ く to have a losing streak
I'm worried because he's had a string of losses this tournament.
黒星くろぼし を 喫きっ する to suffer a defeat
The champion suffered an unexpected defeat.
Related words 負け星 is a more explicit, slightly formal way to say 'loss mark', while 黒星 is the everyday term for the same thing.
敗北 is an abstract, formal word for 'defeat', whereas 黒星 is the concrete symbol used to record a specific loss.
Opposites 白星 marks a win while 黒星 marks a loss, the two symbols used together in sumo and other win/loss records.
黒星 ('black star') marks a loss, the direct opposite of 勝ち星 ('win mark') in sumo and sports scorekeeping.
Counted with dot; spot; speck; mark · mark; grade; score; points · point; score; goal; run · point · point; aspect; respect; detail · punctuation mark; dot · dot stroke · counter for points, marks, goals, etc. · counter for goods, items, articles of clothing, works of art, etc.
Etymology Compound of 黒 (black) and 星 (star, dot). The loss sense comes from sumo, where a black circle (●) is used to record a defeat on a wrestler's record sheet.