JMdict: 1163610

一心不乱 【いっしんふらん】

  1. [adj-na,n] wholeheartedly; with heart and soul; intently; with undivided attention; with intense concentration; single-mindedly
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
One, One Radical (no.1) イチ, イツ ひと-, ひと.つ
Heart, Mind, Spirit, Heart Radical (no. 61) シン こころ, -ごころ
Negative, Non-, Bad, Ugly, Clumsy フ, ブ
Riot, War, Disorder, Disturb ラン, ロン みだ.れる, みだ.る, みだ.す, みだ, おさ.める, わた.る