adverb
Used when something good happens by chance or timing. Often implies a fortunate coincidence. Antonym: 折悪しく (unfortunately).
Antonyms: 折悪しく
折よく、彼が通りかかった。
Fortunately, he happened to pass by.
折よく電車が来たので、すぐに乗れた。
Luckily the train came just then, so I was able to get on right away.
Compound of 折 (opportunity, time) + よく (adverbial form of よい, good). Literally 'at a good time'.