chancy (adj.)youdaoicibaDictYouDict[chancy 词源字典]
1510s, "lucky, foreboding good fortune," from chance (n.) + -y (2). Meaning "uncertain, subject to risk" is recorded from 1860. The possible sense "full of opportunity" seems to have been used regularly only in cricket (1875).[chancy etymology, chancy origin, 英语词源]