JMdict: 1674220

馬の骨 【うまのほね】

  1. [exp,n] person of doubtful origin
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
馬 Horse バ うま, うま-, ま 2
骨 Skeleton, Bone, Remains, Frame コツ ほね 6