怅然若失

怅然若失	chàng rán ruò shī	(idiom) to feel a profound sense of loss; to feel disconsolate
怅	chàng	regretful; upset; despairing; depressed
怅然	chàng rán	disappointed and frustrated
然	rán	correct / right / so / thus / like this / -ly
若	rě	used in 般若 / used in 兰若
若	ruò	to seem / like / as / if
失	shī	to lose / to miss / to fail