JMdict: 2394290

腰を入れる 【こしをいれる】

  1. [exp,v1] to take a solid stance
  2. [exp,v1] to put one's back in it; to exert oneself
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
腰 Loins, Hips, Waist, Low Wainscoting ヨウ こし
入 Enter, Insert ニュウ, ジュ い.る, -い.る, -い.り, い.れる, -い.れ, はい.る