How to say "frustrated" in Japanese

• 悔しいくやしいJLPT N2approx.Common
  i-adjectiveCovers the emotional frustration of having failed, been humiliated, or been treated unfairly — a bitter, chagrined feeling of disappointment. Typical when a lost match or unjust outcome leaves you burning with resentment.
  監督かんとくはチームをトーナメント優勝ゆうしょうに今一いまいち歩あゆみという所ところまでもっていったのに悔くやしいことだった。↗

  It was annoying, as the manager took his team to a near-miss in the tournament.
• 歯がゆいはがゆいCommon
  i-adjectiveCovers frustration as impatience or irritation — the exasperated feeling when things are painfully slow or you can barely contain yourself. Literally 'teeth-itching'; often describes such situations as irritating or frustrating to watch.

Use 「悔しい」 for frustration born of failure, humiliation or injustice; use 「歯がゆい」 for impatient, irritated frustration at things not moving as you wish.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 悔しいくやしいfrustrated (over a failure, humiliation or injustice)
• 歯がゆいはがゆい(feeling) impatient
• 口惜しいくちおしいfrustrated (over a failure, humiliation or injustice)