A contented state of being happy and healthy and prosperous:
— The town was finally on the upbeat after our recent troubles.

synoniemen: eudaemonia, eudaimonia, welfare, well-being, wellbeing.

Nederlands: gezondheid, uitkering, welzijn
Pools: eudajmonia

An unaccented beat (especially the last beat of a measure).

synoniem: offbeat.

Nederlands: opmaat

Pleasantly (even unrealistically) optimistic.

synoniemen: cheerful, pollyannaish.