JMdict: 1163380

一所懸命 【いっしょけんめい】

  1. [adv,adj-na,n] very hard; with utmost effort; as hard as one can; with all one's might; for dear life; eagerly; desperately
  2. [n] (of a samurai) devoting oneself to (the defence of) one's territory
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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
Place, Extent ショ ところ, -ところ, どころ, とこ
State Of Suspension, Hang, Depend, Consult, Distant, Far Apart ケン, ケ か.ける, か.かる
Fate, Command, Decree, Destiny, Life, Appoint メイ, ミョウ いのち

Words often seen with this one: (experimental feature)

 (16), 楽しい (11), こと (10)