1.
pleasant, agreeable, refreshing
Describes something that feels good physically or emotionally — a pleasant sensation, breeze, sound, or response. Slightly more literary than 気持ちいい.
快い風が吹いている。
A pleasant breeze is blowing.
快い音楽が流れていた。
Pleasant music was playing.
朝の散歩は快い疲れをもたらしてくれる。
A morning walk brings a pleasant tiredness.
2.
willing, glad, ready
Describes a willing and positive attitude toward accepting a request or offer. Used when someone agrees to something readily and without reluctance.
快く引き受けてくれた。
They gladly agreed to take it on.
お願いしたら、快く承諾してくれた。
When I asked, they readily consented.
先生は快く推薦状を書いてくださった。
The teacher willingly wrote a letter of recommendation for me.
USAGE:
Sense 1 describes physical or sensory pleasantness and tends toward literary usage. Sense 2 is the more common everyday usage — the adverb form 快く followed by a verb of acceptance is a set pattern meaning "gladly, willingly."
GRAMMAR:
I-adjective. The adverb form 快く is used especially for sense 2.
COMMON COLLOCATIONS:
- 快く引き受ける: to gladly accept
- 快く承諾する: to readily consent
- 快い風: a pleasant breeze
- 快い返事: a favorable reply