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pleasant; agreeable; comfortable; refreshing
窓を開けると快い風が部屋に吹き込んできた。
When they opened the window, a pleasant breeze blew into the room.
高原を吹き抜ける風が快かった。
The breeze blowing across the highland was pleasant.
湿度が高い日は風が快くない。
On humid days, the breeze is not pleasant.