- (of a period of time in the past)
peaceful and happy 平安幸福的 the halcyon days of her youth 她年轻时幸福安宁的日子
Word Originlate Middle English (in the mythological sense): via Latin from Greek alkuōn ‘kingfisher’ (also halkuōn, by association with hals ‘sea’ and kuōn ‘conceiving’).