快い
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Base na-adjective form. Used with 『な』 (na) before nouns, e.g., 『快な天気』 (kokoroyoi na tenki, 'pleasant weather').
Theme
User and their friend Mika are relaxing at a park on a sunny day, enjoying the atmosphere.
快い
こころよい
pleasant / agreeable
Core Language Building BlocksCore Adjectives
Memory Hook
Imagine a 'kite' flying on a pleasant day — it feels so agreeable! 'Kite' sounds like 'kai' in 『快い』 (kokoroyoi, 'pleasant').
Cultural Note
『快い』 (kokoroyoi) is often used in formal or literary contexts to describe pleasant feelings, such as a comfortable breeze or agreeable conversation. It's less common in casual speech than simpler words like 『いい』 (ii, 'good').
Forms
Base: 快いBase na-adjective form. Used with 『な』 (na) before nouns, e.g., 『快な天気』 (kokoroyoi na tenki, 'pleasant weather').
Negative: 快くないDrop 『い』 → add 『くない』 (kunai, negative) → 『快くない』 (kokoroyokunai). Note: This form is less common; often replaced with 『快でない』 (kokoroyoi de nai).
Past: 快かったDrop 『い』 → add 『かった』 (katta, past) → 『快かった』 (kokoroyokatta).
Adverbial: 快くDrop 『い』 → add 『く』 (ku, adverbial) → 『快く』 (kokoroyoku).
Comparative: より快いComparative formed with modifier 『より』 (yori, 'more than') + base adjective.
Superlative: 一番快いSuperlative formed with 『一番』 (ichiban, 'number one / Most') + adjective.