Senses
偶成 to write casually
(literary) to write or compose something casually or spontaneously, often used in the titles of classical poems or lyrics
偶成 to happen by chance
(literary) to be completed or happen by chance; to succeed by a stroke of luck
偶成 to marry
(literary) to become a couple or join in marriage
偶成 occasionally
(literary) occasionally; incidentally; on a whim