悔しい

くやしい

口惜しい悔やしい

[kuyashii]

Meanings

1.Adj-i

frustrated (over a failure, humiliation or injustice); annoyed; chagrined; (bitterly) disappointed; bitter; vexed; frustrating; annoying; regrettable

試合に負けてしまい本当に悔しかった。

I was frustrated to lose the match.

悔しい思いをバネに頑張った。

I worked hard using my frustration as motivation.

悔しくて思わず涙が出てきた。

Tears came out involuntarily from frustration.