悔しい
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Base i-adjective form ending in 『い』. Describes feelings of regret, frustration, or vexation.
Theme

After a friendly video game match, User and their friend Ken are discussing the outcome and their feelings about it.

悔しい

くやしい

regrettable / mortifying / vexing

People & IdentityEmotions & Personality

Memory Hook

Imagine feeling so 'vexed' after a mistake that you say 'Kui-shi!' — it sounds like 'cry, she' in frustration. 'Cry-she' → くやしい (kuyashii, 'regrettable').

Cultural Note

『悔しい』 (kuyashii, 'regrettable') is often used in sports, games, or competitions in Japan to express frustration over a loss or mistake. It's a common emotion in media like anime and manga, showing determination to improve.

Forms

Base: 悔しいBase i-adjective form ending in 『い』. Describes feelings of regret, frustration, or vexation.
Negative: 悔しくないDrop 『い』 → add 『くない』 (kunai, negative) → 『悔しくない』 (kuyashikunai).
Past: 悔しかったDrop 『い』 → add 『かった』 (katta, past) → 『悔しかった』 (kuyashikatta).
Adverbial: 悔しくDrop 『い』 → add 『く』 (ku, adverbial) → 『悔しく』 (kuyashiku).
Comparative: より悔しいComparative formed with modifier 『より』 (yori, 'more than') + base adjective.
Superlative: 一番悔しいSuperlative formed with 『一番』 (ichiban, 'number one / Most') + adjective.