JMdict: 1828670

愚弟 【ぐてい】

  1. [n] (one's) younger brother
  2. [n] foolish younger brother
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
愚 Foolish, Folly, Absurdity, Stupid グ おろ.か
弟 Younger Brother, Faithful Service To Elders テイ, ダイ, デ おとうと