1. The spending of as little money as possible by living cheaply, mainly because of difficult economic circumstances. English = frugality, sparingness, scrimping, economising.
2. A plan showing how much money a person or organisation has available and how it should be spent. English = budget.
As a Verb or Adjective
1. To live cheaply and spend as little money as possible; to use severe economy; to manage under difficult economic circumstances. English = scrimp, scrimp and save, (be) frugal, (be) sparing, make ends meet.
2. To plan carefully how much you are going to spend on each thing you want. English = budget.