虧得

fortunately / luckily / (sarcastic) fancy that, how fortunate!

deficiency / deficit / luckily / it's lucky that... / (often ironically) fancy that...

to obtain / to get / to gain / to catch (a disease) / proper / suitable / proud / contented / to allow / to permit / ready / finished

structural particle: used after a verb (or adjective as main verb), linking it to following phrase indicating effect, degree, possibility etc

to have to / must / ought to / to need to