一所懸命

いっしょけんめい

very hard; with utmost effort; as hard as one can; with all one's might

Meaning

advadj-nan
very hard; with utmost effort; as hard as one can; with all one's might; for dear life; eagerly; desperately
n
(of a samurai) devoting oneself to (the defence of) one's territory

Example sentences

彼は一所懸命勉強した、そうでなかったら、試験に落ちていただろう。

He worked hard; otherwise he would have failed in the examination.
一所懸命働いて彼は成功した。

Hard work has brought him success.
一所懸命になって彼はその木に登った。

With great effort he climbed up the tree.