hal·cy·on
adjective/ˈhælsiən/
/ˈhælsiən/
[usually before noun] (literary)- (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’). - the halcyon days of her youth